I posted this a week ago elsewhere but thought you guys might find it of interest too.
After personally experiencing having my phone (A Verizon GN) end up LESS charged than I started out with on a 1 hour trip with navigation on while plugged in, I decided to run some tests.
The first was to see how much power the Galaxy Nexus could draw from the USB connection. This turns out to be about 4.5W. (0.9A at 5V)
(Edit: Yes I tied the data lines together so the GN knew it was hooked to a charger and not a PC)
I ran all kinds of applications, benchmarks, turned on all the networking, GPS. Just sitting there idle or in sleep mode it only drew 3.5W but I could push it up to 4.5W which is fairly close to the max most USB adapters can supply. My PS can deliver 8W so it had plenty of power to offer. So no matter how powerful your charger is, the GN simply won't draw more than 4.5W. Forget about those 3A chargers.
The next test was a bit trickier. I wanted to measure how much power the GN was drawing from the battery. Tiny contacts and an expensive phone made me a little cautious but I figured out a fairly safe way of doing this, and here are the results.
In sleep mode it only drew 0.04W with occasional spikes of 1W.
Powered on and idle it averaged 3W.
Running a CPU benchmark it stayed at 4W.
Downloading a large file over WiFi got a steady 4.2W.
Now the real test... Google Maps.
This varied a LOT. Minimum was 4W with some steady peaks of 5.1W!
That seems to be the problem. The GN can draw more power from the battery than the charging system can provide. In the real world the power draw is going to be worse because of all the switching of cell towers and map data downloading. I wasn't about to take my very delicate wiring job on the road, so will just have to guess at the final numbers, but just sitting still was enough to overpower the charger.
I doubt this can be a software fix where a hardware register can be changed to let the charging system draw 1.5A or something.
This also means that a 2A or 3A power supply is not going to help. As long as you have a 1A supply, that's all the GN will take. Do make sure it's wired right or it will only draw 0.5A, and be warned some USB jacks on stereos and computers might only give you 0.1A.
Now on to something else... the AMOLED screen! Does keeping it black really save power? The answer is... sort of!
I ran several tests with the device in airplane mode and just showing a solid color on the screen on the dimmest, and brightest screen settings.
Dim black: 1.8W
Dim white: 2.0W
Bright black: 1.9W
Bright white: 2.9W
For extra fun...
Bright Red: 2.5W
Bright Green: 2.6W
Bright Blue: 2.8W
So if you run the screen at the dimmest setting, it really doesn't matter what the screen is showing. If you run it at the brightest... then white really does draw more power. A lot more. If you can set Google Maps to display the screen mostly black, that could save a significant amount of power during navigation.
I was unable to find a way of turning off the display without putting the phone to sleep, so no idea how much of that power shown above is due to the screen and how much to running the CPU and all the other functions.
Anyway, I still have my spare battery rigged up so if you have any other good ideas for tests I can try them out.
Summary... under extreme battery drain conditions even the best USB charger can't keep up, but all you need to do is reduce the power draw a small amount and you will be back in the positive. Make sure your charger is supplying a full amp. Cheap chargers and cables without the data lines shorted will only give 0.5A and that is by far NOT enough to keep a GN charged while doing anything at all.
The screen measurement is awesome, good to see some real numbers (even if its not 100% accurate).
Also some things you do can still be done with the screen off. Like downloading a large file - or playing music. You could easily compare downloading a file and/or playing music with screen on or off to see the difference. Another interesting thing would be downloading via wifi vs download on 3g and LTE
wonshikee said:
Also some things you do can still be done with the screen off. Like downloading a large file - or playing music. You could easily compare downloading a file and/or playing music with screen on or off to see the difference. Another interesting thing would be downloading via wifi vs download on 3g and LTE
Click to expand...
Click to collapse
+1
And maybe also playing a HD (1280x720) video in Dice Player with full brightness...
It's important to point out that when your device uses more battery than it is able to recharge while being charged at the same time, then you are prone to sleep of death problem. I had exactly that happen on a ship to Finland. I only realized it the next day, once my battery ran down to percentages it was while I was on a ship and it froze. After reboot, I had lost up to 20% battery.
So I would avoid using the device while it is charging, but battery still runs down.
kristovaher said:
It's important to point out that when your device uses more battery than it is able to recharge while being charged at the same time, then you are prone to sleep of death problem.
Click to expand...
Click to collapse
My previous Android phone had this issue. If it got discharged too far it would shut down and wouldn't charge back up. I had to manually hook up power to the battery to kick start it. In fact... my former phone before that (Windows Mobile!) had the same issue! Seems to be a common design flaw.
iansmith said:
I posted this a week ago elsewhere but thought you guys might find it of interest too.
After personally experiencing having my phone (A Verizon GN) end up LESS charged than I started out with on a 1 hour trip with navigation on while plugged in, I decided to run some tests.
The first was to see how much power the Galaxy Nexus could draw from the USB connection. This turns out to be about 4.5W. (0.9A at 5V)
(Edit: Yes I tied the data lines together so the GN knew it was hooked to a charger and not a PC)
Click to expand...
Click to collapse
Saw this when you posted it "elsewhere" a week or so ago. Definitely might get more love here though. I love the idea of people or google developing more black background apps and a night mode of Maps / Navigation and Gmail. Seeing these numbers it really would make a difference.
Very interesting write up! I have a question though...you mention shorting the data lines to get a full amp. Is there a tutorial somewhere that explains how to do this? I will be taking a long road trip (like 3600 miles round trip long) this summer and will be using GPS a lot so I would sure like to do that. I would be running a Rocketfish car charger-to-USB adapter and using a USB cord plugged into that and then run that to the car dock. Thanks.
Accord281 said:
Very interesting write up! I have a question though...you mention shorting the data lines to get a full amp. Is there a tutorial somewhere that explains how to do this? I will be taking a long road trip (like 3600 miles round trip long) this summer and will be using GPS a lot so I would sure like to do that. I would be running a Rocketfish car charger-to-USB adapter and using a USB cord plugged into that and then run that to the car dock. Thanks.
Click to expand...
Click to collapse
http://www.amazon.com/gp/product/B003VYBCAY/ref=oh_o00_s00_i00_details
These cables don't have a data line, it'll get you the full amp. Big difference when I use it in my car vs a normal cable.
When we use the provided cable and Samsung USB adapter we still get 1A correct?
Sent from my Galaxy Nexus using xda premium
arasky said:
When we use the provided cable and Samsung USB adapter we still get 1A correct?
Click to expand...
Click to collapse
Yes, the provided adapter gives out a full 1 amp and shorts the data lines so the phone knows it can draw as much current as it can handle.
Related
Today was the first time I let my phone's battery drain down to nothing and it died completely while i was on a phone call. But when it died, the screen went black as it should, but it refused to charge. The light didnt come on and it wouldnt power on. I had to pull the battery and then it booted to a 'critically low battery' notification on the screen. Has anyone experienced this kind of freezing when the battery is just on the verge of dying?
I don't have this specific issue, but definitely power draining problems on my Focus. I let it charge overnight - 10+ hours plugged in. That should be more than enough for a nice, full charge. Well it's been unplugged from the charger for a little over 3 hours now and it's already down 30%. All I did was listen to 4 songs on the Zune on the way to the office this morning.
Same thing happened yesterday. So two days in a row isn't looking good. By early afternoon yesterday it was almost drained.
I haven't even made any phone calls with this yet! I can only imagine what a handful of 30 minute phone calls would do.
hmm... faulty battery/phone? maybe take it back to the store and ask for an exchange?
Is there any way to calibrate the battery? Such as completely drain it, fully charge it then look around the settings menu for a way to delete any kind of battery stats file?
Sent from my SAMSUNG-SGH-I897 using XDA App
I was thinking the same thing, about exchanging it. I'm going to give it more time and really put it through some paces to verify. I've got until the end of November to exchange it.
This was all without any Wifi on too
I've noticed my LG-C900 also seems like a battery hog, and takes forever to charge. The Samsung SGH-i917 is a little better, but both of them have a tendency to run out of battery quickly if I forget to charge them overnight. It's a little worrisome to me.
I don't measure smartphone battery length systematically, but my Motorola Droid seems to do a lot better, and my HTC G1 has gone all week without being charged (although the graphics aren't nearly as good, the processor doesn't have to work as hard even to change menus).
On the other hand, the advantage is in both of those phones, it is much easier to change batteries, making it possible to carry an extra battery and switch halfway through the day, something you could never do with an iphone.
The Gate Keeper said:
hmm... faulty battery/phone? maybe take it back to the store and ask for an exchange?
Click to expand...
Click to collapse
That would probably be a good idea.
you could look at the wifi status , turn it off when you don't need it .
wifi is "on" as default , if I don't turn it off my batt is dying really quick .
I didn't look at it but maybe you can also turn off the GPS .
The first Focus I got shipped from AT&T refused to take a charge. You could plug it in and the icon would change to a plug, but it wouldn't charge up at all. I replaced it at a store and the new one is perfect. Charges quickly and lasts much longer than my old Fuze. I don't know if it was the phone or the battery, but I'd just get a replacement.
For some reason my HD7 won't charge from PC USB ports-- it's been "critically low" in the morning the two times I left it plugged into a PC overnight (orange light on, but apparently not charging quickly enough).
The ports work fine charging my HD2 and iPhones-- apparently not with the HD7 though. Only dedicated AC adapters feeding a full 1A have worked so far-- not hugely inconvenient, but kind of odd.
my G1 and HD2 would exibit this behavior when on my car's USB port when the charge was low enough, and the last system update that came down for the G1 would just slow the drain when attached to my car.
The first trip with the HD7 in the car > home, it died on the car's USB port, very slowly. After its first full charge it does accept a charge from the car. I think it may have issues once it gets low enough just like the HD2. I think it may be the output, I don't remember how much power Honda supplies at the USB port, but obviously not enough for all devices. All my ports on my laptop, desktop and WHS, except the front ports on the WHS and the desktop, charge these 3 devices handily, the front ports on the home server and the desktop must only provide minimal power, I've had USB sticks complain and drop speed on these.
A few days ago I purchased Galaxy S II official vehicle dock, so today I decided to give it a try. But to the problem I ran into, was that when I was using GPS (CoPilot) the phone shows that its charging, but it actually slowly discharges it. Well first I thought that, my car cigarette lighter plug didn't give it enough juice, but then I tried the same thing with the phone connected to regular power outlet using the original charger. The result was that the phone shows that its charging, but the percentage doesn't go up or down, it just idles at the percentage point, when i connected it to charger. I'm pretty sure it should charge the phone, even if I use GPS and the screen is switched on. My second thought was that the phone was overheating due to hot weather, but im not sure about this.
The only time I actually got the phone charging through the cigarette plug, was when the phone's screen was switched off.
So my question is what should I do? Is the dock connector damaged or something? should I consider changing it or is there some other problem? I have read all the topics about this issue and its seems, that there is no firm fix for this. Im really running out of ideas.
(The phone was charged to 80% when I encountered this problem.)
About phone:
Android version: 4.0.4
Kernel version: 3.0.33-Siyah-v3.3.1
Resurrection version 2.1
CurrentWidget stats:
Running GPS and screen switched on
638mA - when connected to regular power outlet
640mA - when connected to cigarette lighter plug
4.071V
Temp. 51C
I have actually the same issue, I just presumed that the car charger doesn't produce enough charge to actually charge.
Madiz said:
A few days ago I purchased Galaxy S II official vehicle dock, so today I decided to give it a try. But to the problem I ran into, was that when I was using GPS (CoPilot) the phone shows that its charging, but it actually slowly discharges it. Well first I thought that, my car cigarette lighter plug didn't give it enough juice, but then I tried the same thing with the phone connected to regular power outlet using the original charger. The result was that the phone shows that its charging, but the percentage doesn't go up or down, it just idles at the percentage point, when i connected it to charger. I'm pretty sure it should charge the phone, even if I use GPS and the screen is switched on. My second thought was that the phone was overheating due to hot weather, but im not sure about this.
The only time I actually got the phone charging through the cigarette plug, was when the phone's screen was switched off.
So my question is what should I do? Is the dock connector damaged or something? should I consider changing it or is there some other problem? I have read all the topics about this issue and its seems, that there is no firm fix for this. Im really running out of ideas.
(The phone was charged to 80% when I encountered this problem.)
About phone:
Android version: 4.0.4
Kernel version: 3.0.33-Siyah-v3.3.1
Resurrection version 2.1
CurrentWidget stats:
Running GPS and screen switched on
638mA - when connected to regular power outlet
640mA - when connected to cigarette lighter plug
4.071V
Temp. 51C
Click to expand...
Click to collapse
I can only give you 3 guesses:
1- Maybe it's some sort of weird software bug (maybe the ICS 4.0.4 + SiyahKernel combination or something);
2- It's simply the battery chip going crazy (whenever my battery indicator seems to go nuts I simply reset the fuel gauge with ExTweaks, you might wanna give it a try); and
3- A bad or damaged car-plug charger (since you have that problem when charging from the dock and directly from an original charger, I don't think it's a bad dock).
I'm saying that because I use the original car dock quite a lot - almost always for usage as a GPS Navigator (NDrive 11) with GPS, Data and WiFi Connection always on (too lazy to turn WiFi off while in the car) and usually with an increased brightness (around 50 - 70%) and even in those battery unfriendly conditions (GPS on and locked, WiFi and Data on, high brightness, etc, etc, etc) it still charges the battery. It takes a while to get a full charge, but it gets fully charged eventually. And I sometimes use the car-plug charger directly in the phone, when I'm not using my S2 as a GPS Navigator.
I would suggest you to try and use another ORIGINAL car-plug charger to check - or maybe go back to whoever sold you the dock and get it replaced or something...
Hope this helps. Best regards mate.
Tiu Fiu said:
I can only give you 3 guesses:
1- Maybe it's some sort of weird software bug (maybe the ICS 4.0.4 + SiyahKernel combination or something);
2- It's simply the battery chip going crazy (whenever my battery indicator seems to go nuts I simply reset the fuel gauge with ExTweaks, you might wanna give it a try); and
3- A bad or damaged car-plug charger (since you have that problem when charging from the dock and directly from an original charger, I don't think it's a bad dock).
I'm saying that because I use the original car dock quite a lot - almost always for usage as a GPS Navigator (NDrive 11) with GPS, Data and WiFi Connection always on (too lazy to turn WiFi off while in the car) and usually with an increased brightness (around 50 - 70%) and even in those battery unfriendly conditions (GPS on and locked, WiFi and Data on, high brightness, etc, etc, etc) it still charges the battery. It takes a while to get a full charge, but it gets fully charged eventually. And I sometimes use the car-plug charger directly in the phone, when I'm not using my S2 as a GPS Navigator.
I would suggest you to try and use another ORIGINAL car-plug charger to check - or maybe go back to whoever sold you the dock and get it replaced or something...
Hope this helps. Best regards mate.
Click to expand...
Click to collapse
Thanks, I thought that this had something to to with some factory blunder, but if you're saying that it works for you, then I'll give it a try and see if I can figure out what the problem is.
Anybody have an idea where to buy in México?
Sent from my GT-I9100 using xda app-developers app
Michaelias said:
Anybody have an idea where to buy in México?
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
You can buy it on eBay - there are a lot of UK stores with very high positive reputation - I bought mine from one in UK, and it arrived about 3 weeks after the purchase (and keep in mind that the brazilian customs is recognized worldwide as one of the slowest, most burocratic in the planet). It was worth the wait, though, as the minimum value of the original vehicle dock sold "officially" in Brazil was more than twice the purchase and shipping costs from buying it in eBay...
Your problem, is everyone's problem.
This phone will only charge at 750ma, and not 1A like most smart phones.
You can change this by rooting the deivce and installing a different kernal.
Should you do this, you may notice the phone getting hotter whilst charging, and I imagine your battery's overall lifespan will be shorter,
Fon22
Just got my M8 first time I turn it on it had half charged battery. I drained it to a point when I turned it on two times and than it went dead. I mean I could not turn it on. When I connected the charger no light came on and no response from phone. I leave it till toomorow and see if it will turn on.
I fear HTC is using the same chip for controling battery charge in M8 which if flawed by infamous HTC charging bug. If this is the case it is really start annoyng me and htc m8 will be my last HTC phone. I had so far Wildfire, Sensation ,Desire and all off them had a charging bug. Wildfire and Desire would not show the battery full even though battery voltage was at full charge. My luck? Or HTC has some poor quality components? My S2 still charges battery fine till today.
Ok. Anyone can check their M8 if you have charge bug if you battery is almost drained off power if it will turn on or stay dead?
If my won't wake up tommorow after all night at charging I'm gona exchange it on warranty and see another sample has the same charge bug.
Why HTC is not doing something with this CHARGE BUG on the newest devices? Puzzeles me.
I brought mine to 1%, cycled the power, then used it again till it died. Plugged it in, charging icon came on right away, charging light as well. Hope this answers your question, I didn't really read the whole post.
=)
Sent from my HTC One_M8 using xda
Visspui said:
I brought mine to 1%, cycled the power, then used it again till it died. Plugged it in, charging icon came on right away, charging light as well. Hope this answers your question, I didn't really read the whole post.
=)
Sent from my HTC One_M8 using xda
Click to expand...
Click to collapse
My M8 has just died because it wont charge, happened just yesterday. I left it plugged in over night and still nothing. Its a holiday here at the moment so have to wait until Wednesday for HTC to open.
Possibly The same Problem, Possibly Not?
andy905 said:
My M8 has just died because it wont charge, happened just yesterday. I left it plugged in over night and still nothing. Its a holiday here at the moment so have to wait until Wednesday for HTC to open.
Click to expand...
Click to collapse
Hi.
I've been having loads of problems having unlocked, rooted, S-Off, SuperCID & installing the ARHD ROM on my M8 (International) but it was, in a fashion, working. I too am on holiday & whilst I now know why I was having the issues & have the solution to them, I didn't have time before I left to resolve them. So, I brought it away with me to use for basic currency conversion & translation tasks & it was, as I say, functional. Last night, I decided to play a game on it & it was being laggy but I put this down to the issues I've been having, so didn't worry. It kept being laggy, so I tried restarting it to see if that would help but once it had powered down, it took ages to reboot, so I tried using the power button to switch it on. Again, it took ages & I briefly fell asleep but when I woke up, it had booted back into ARHD, so I figured all was okay.
However, when I awoke this morning, the device would not switch on. I plugged it in to see if something had caused the battery to drain during the night but nothing happens; the charging light doesn't come on & it doesn't power up, no matter how long I leave it! It is, to all intents & purposes, behaving as though it is dead (bricked?) but I don't know why it should suddenly do this, which is why I was looking for answers & came across this thread.
If anyone has any bright ideas, I'd be more than grateful to hear them
Mine needed a replacement charging board and chip unfortunately but HTC Vietnam was pretty fast, only took 3 days so wasn't too painful.
I like how "Happened to three people" == "infamous."
Yes, this sounds like a very isolated bug/defect. Since it is not reported by very many, the best course of action is RMA. ?
My T-mobile HTC ONE M8 has done this as well, however I was after serveral hours of trying everything I could think of, connecting it to the computer and various chargers and trying to hold volume up and power and replugging it to charger, it finally started charging. This has happened 2 times in the last 2 weeks.
Now that it's charging I wonder if HTC will take it and replace the charging board or battery. I also worry that I have it rooted and s=off that they won't honor the warranty.
There is something similar to this going on with mine - Was charging (maybe quite slowly), battery very low, phone reset. Booted into charging screen, amber light flashing. After a while (and trying to boot a few times), no light, nothing. Charge current is 0.00A
Edit: I remember something like this with the old Desire - there was a trick to reset the charging circuit, which was maybe locked up and not getting a good po_reset, so never enabling any charge. Something along the lines of unplug, hold some buttons for some time, plug, profit... Does anyone remember this in detail?
I had the issue in this topic, and got it solved.
Here are forums where I have found similar case and solution.
https://www.noppanit.com/htc-one-wont-turn-on-after-battery-completely-drained/9h53
http://www.pocketables.com/2015/06/htc-one-m9-unresponsive-no-charge-light-wont-power-on.html
http://forum.xda-developers.com/showthread.php?t=2481211
I have a particular case. My phone is a HTC One M8, but I have protected it with a special case with a battery extension, home made. I have assembled myself the batteries, chargers and boosters. My booster has a small issue and does not enter safe mode when battery is low. It warns about low batt with a LED, but still tries to deliver 5V. The booster is connected to the phone via a flat cable, stolen from a wireless charger; those chargers have the smallest USB plus I could find ever, and, I found this plug only in these decvices.
When the main battery of the phone is empty, I switch the booster on, and recharge the phone with the backpack. I have to look at the LED; when it's red, I have to switch it off. Everynight, everything get charged on the same single plug. One plug to charge both batts.
The advantages of my solution are:
- phone can last 18h with heavy work (wifi, bluetooth, GPS, and screen on, continuously)
- heavy case to protect my phone, plus tampered glass
- one plug to charge everything
- the micro-micro USB plug is ALWAYS in the phone. This means, the female plug of phone can not get dirty, or filled with dust. I never unplug it, so it does not age. I never plug a classic USB cable directly in the phone, so, no chance to break it. I have broken 3 or 4 times the back charger plug; if I am in hurry, I can exceptionally charge the phone directly; next day home, I can fix it.
This night, I was using my phone, and switched the backpack on. I could not plug my wall charger, because it's home made, has an issue, and makes the virtual keyboard erratic. I fell asleep with the phone in my hand, and the backpack went red ... for 4 hours. During 4 hours, it was trying to deliver 5V, and failed at so. Since my battery was delivering an unstable +5V, the phone was trying to charge, was staying on, but could not properly charge. In the end, all batteries got flat.
This morning, when I woke up, I plugged the stuff; only the back-batt started charging. Phone itself refused to charge; screen was black, and charging LED stayed off. So, I fell in what we call the "phone refuses to charge".
But, because of my set-up, I can *NOT* be in the dirty or broken plug case. Just impossible. And because of context, I just knew I had a flatt battery. This is technically called "deep discharged". And it contributes to aging of batt. Like overcharging, this heavily affects the total capacity.
I knew I could fix the issue by opening the phone, and putting a LiPo charger directly on the batt lines. I have loads of standalone chargers. I had a standalone wall charger for my previous HTC Sensation. But with the M8, we can not just open the case, and take the batt out. It's much more complicated. So, I have been Googling for more than half an hour. 95% results were about "remove dust of plug" and "bring it to the shop to change your plug". Some people also mention "a bug in the charger chipset".
I have plugged the phone on a classic USB charger, but via an USB meter monitor:
dx.com/p/382581 (dispite description, the device can accept up to 13V on input - this detail is critical when you use real QC2 chargers able to deliver 9 and 12V, like this one:
http://www.amazon.fr/Chargeur-secte...&qid=1451509059&sr=8-4&keywords=aukey+charger
http://www.amazon.fr/batterie-exter...&qid=1451509059&sr=8-5&keywords=aukey+charger
)
The USB meter was indicating 5V 0.03 A (or 9V 0.01 A, depending on source). So, the phone was using a bit of energy, but clearly not charging. I have left it 4h. Just in case, can not harm.
Then, I pressed together power, and volume up. The phone started to boot after 55 or 65s. About one minute; but clearly way longer than 42 or 47s found on forums. It started directly to some rescue mode, then, started to boot normally, without doing anything. Just released buttons during the first white screen. After booting, I have a normal phone. Did not need to perform any action. During boot, the phone had 2% batt, and was charging normaly. But, the charger LED remained off; I waited 5mn, untill I got 4%, unplugged the charger, replugged, and then got the orange LED.
Remember that your M8 can accept up to 9V on input. QC2 Chargers are really faster: with 9V 1.5A, you can charge your M8 from 0% to 100% in 95mn, even if you are intensively using it (gaming, wifi, GPS). Next gen phone will accept 12V. Even if manufacturers ignore that. HTC buys chips, and don't fully read specs. Aukey chargers are more powerfull and better reliable than official HTC ones.
Remember that many "slow charging" issues are in fact due to bad cable: charger is good, phone is good, but cable in between has high gauge copper, too thin wires, and produces voltage drop between plugs. HTC phones require 4.4V at the plug.
Remember that M8 and most modern phones (same for Samsung) are now MHL (wrongly called OTG): they are true USB hosts; you can plug any device on your phone; just buy an MHL (OTG) cable for 4 euros, and then a USB hub, and then any device: mouse, keyboard, USB monitor, ethernet dongle, SATA adapter, CF-uSD adapter ... and for 12 euros you have HDMI converters. Modern smartphones are real computers. Use them.
Hello XDA members. I have a very troublesome issue with my galaxy tab 3 7.0 inch tablet. It will NOT turn on at all, no battery charging, no device power on, no comp recognition, nothing. I have already tried:
Letting it charge overnight (factory charger along with others) with several known working cables
Unplug battery for 5 minutes
Press and hold power, Vol Down, and home for 10 sec, 30 sec, and 1 minute
Press and hold power and vol down for 10,30,60 seconds.
I sent it in for repair and they wouldnt fix it because it's rooted. When I got it back it briefly turned on to the battery charging, but nothing since. I'm thinking there must have been some way they got it on.... All proper drivers are installed on PC and it's never been dropped, water damaged, etc.
Would anyone be able to provide insight as to why and provide a fix?
My 8 inch tab 3 wasn't coming on either a few days back, I got it back on by holding home and the power button for a while. I was about to give upwhen the battery charging image came on. I think I did the same again and it came on normally.
a97antonio said:
My 8 inch tab 3 wasn't coming on either a few days back, I got it back on by holding home and the power button for a while. I was about to give upwhen the battery charging image came on. I think I did the same again and it came on normally.
Click to expand...
Click to collapse
Was that from computer or wall?
From wall, it was about 3/4 charged by then
a97antonio said:
My 8 inch tab 3 wasn't coming on either a few days back, I got it back on by holding home and the power button for a while. I was about to give upwhen the battery charging image came on. I think I did the same again and it came on normally.
Click to expand...
Click to collapse
a97antonio said:
From wall, it was about 3/4 charged by then
Click to expand...
Click to collapse
Still no luck... I can feel the tablet getting hot down at the charge port so I know it's charging, and i know the lcd isn't damaged.
Mine is in the same condition. Anyone know how or why this happens and how to fix it?
Sent from my LG-LS980 using Tapatalk
Not sure if this will help, but just like with phones, sometimes android tablets just need a battery pull. My kids xo tablet went dead and before I tossed it in the trash I took the housing off and had to clip the + wire since it was soldered to the board. Twisted it back together to check and sure enough the tablet powered on like normal. Ive had to pull the battery on an Sm-t217a and it was a lot easier. They have a removable clip that attaches to the board.
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I think it might be the battery itself. Just for giggles I left it plugged in for days and i just checked back on it and the Battery charging screen kept flashing on and off. Won't hold any charge. Probably will just order a new battery and see what happens. I pulled the battery a couple times and nothing happened. Closer inspection found that the tech that looked at it damaged the battery cord (unless it came with the copper on the wiring already exposed...)
xkn0s said:
I think it might be the battery itself. Just for giggles I left it plugged in for days and i just checked back on it and the Battery charging screen kept flashing on and off. Won't hold any charge. Probably will just order a new battery and see what happens. I pulled the battery a couple times and nothing happened. Closer inspection found that the tech that looked at it damaged the battery cord (unless it came with the copper on the wiring already exposed...)
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You might be right about the battery being dead, although they usually don't just go all at once like that. The charge indicator flashing is odd. The only thing close I've seen is an "x" over the icon when there aren't enough amps (my tab needs 2 amps. 1 amp chargers and some pc usb ports give me the x.
If you have an old cable you can cut, you could try to charge the battery itself to see if it takes a charge (or at least use a multimeter on it to check for voltage). Then you could narrow it down a bit to whether it is the battery or possibly the charge port/hardware..... I saw a bit of exposed wire just before the clip of mine too, made me extra careful pulling the clip up.
rmntruexjr said:
You might be right about the battery being dead, although they usually don't just go all at once like that. The charge indicator flashing is odd. The only thing close I've seen is an "x" over the icon when there aren't enough amps (my tab needs 2 amps. 1 amp chargers and some pc usb ports give me the x.
If you have an old cable you can cut, you could try to charge the battery itself to see if it takes a charge (or at least use a multimeter on it to check for voltage). Then you could narrow it down a bit to whether it is the battery or possibly the charge port/hardware..... I saw a bit of exposed wire just before the clip of mine too, made me extra careful pulling the clip up.
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I wouldn't even know where to start with the wiring. Multimeter isn't something I have access to, and it seems a little complicated for me to spend time on.
When I say it's flashing, I mean the device powers on to the battery charging screen, then dies, wash rinse repeat. If I go into recovery, same thing. It all happens within a couple seconds, so it's hard to describe.
My dad has one that I can pull the battery from, I might do that. Batteries are like 20 bucks on amazon, so I think I'll test with my Dads and if it works just order a battery and report back here.
similar problem here
rmntruexjr said:
You might be right about the battery being dead, although they usually don't just go all at once like that. The charge indicator flashing is odd. The only thing close I've seen is an "x" over the icon when there aren't enough amps (my tab needs 2 amps. 1 amp chargers and some pc usb ports give me the x.
If you have an old cable you can cut, you could try to charge the battery itself to see if it takes a charge (or at least use a multimeter on it to check for voltage). Then you could narrow it down a bit to whether it is the battery or possibly the charge port/hardware..... I saw a bit of exposed wire just before the clip of mine too, made me extra careful pulling the clip up.
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Click to collapse
My daughters tab 3 7 inch T210 also refuses to start. First time it was fixed by opening the device and disconnecting the battery. Now that doesn't help anymore. If I attach the original charger and measure the voltage when the device has rested for some months I can see that the voltage slowly rises so it seems to do the charging even if there is no sign of charging on the screen. After some hours of charging I measure 3,78V on the battery, after disconnecting the battery.
If I attach the battery and turn on the device I measure 3,76V before I push the start button and 3,74V directly after pushing the button. After about 15s the voltage goes back to 3,76V. Nothing happens on the screen... Tried with different combinations of pushing on-button and volume up, volume down, menu....
So -the best thing would of course be a quick visit to local shop to buy a new device of another brand but for some reason I refuse to give up.
Any advice would be appreciated.
(I Have made no significant modifications but the 4-year old daughter may have contributed in an unknown way )
magnusn68 said:
My daughters tab 3 7 inch T210 also refuses to start.
So -the best thing would of course be a quick visit to local shop to buy a new device of another brand but for some reason I refuse to give up.
Any advice would be appreciated.
(I Have made no significant modifications but the 4-year old daughter may have contributed in an unknown way )
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The better way to test if your tablet can turn on: buy a new battery, under $15 on Ebay since your old battery is dead or completely drained.
Use the new battery to turn on your tablet. If it's on, check the build number of your device after go to About My Device: if it's not end with OB1, the latest firmware which fix charging issue.
It's more likely your build number is MK1 to NI1, the build numbers count by alphabet order. Upgrade the software via Wifi, battery must be at least 25%, otherwise your tablet won't allow you to upgrade. Bring the firmware to the current OB1, your tablet should take charge normally, otherwise the USB charging port is defective or damaged. This micro USB is cheap, around $2, but it need to solder to motherboard to replace the defective one.
This started happening a couple of weeks ago, prior to the latest update.
When I put my P6P on the Stand 2 at the end of the day, I get the little sound and animation that it started charging. After a few seconds I see the message at the bottom that it's "charging wirelessly" and a time until full. I have the stand set on Max Charging and adaptive charging turned off. After a minute or two, the fan comes on. About 10-15 minutes later, it stops charging, (the message goes away and the current % is shown), and the phone is really hot. No matter how long I leave it, even overnight, it never starts charging again. The phone remains really hot until I remove it from the stand.
About 50% of the time, if I reboot it, it will behave normally again, but last night nothing I did would get it to charge wirelessly. I ended up plugging it into the wire. It never gets warm when charging on the wire.
It has been working fine since I purchased it in Nov. This just started a few weeks ago. Has anyone else seen this?
Dave
Try cable charging.
Charging will disengage if the battery temperature gets too hot, about >103F
Fast charging may disengage if the temperature gets beyond 95-100F.
Ideal charging battery start temp is 82F.
Erratic charging can indicate a failed battery.
Any swelling is a failure, replace asap if so.
blackhawk said:
Try cable charging.
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As indicated in my OP, cable charging works fine every time. The phone doesn't even get warm. It's only wireless charging that's an issue, and not every time I try to charge it wirelesly. It's like the phone decides to stop accepting the power, and it starts to heat up because of it.
I take it you don't have a second wireless stand to rule out if it's the phone or your STand 2 that's behaving badly?
I have been using a genric set-up from charger to stand with my P6P and did have charging issues a few months ago with wireless charging not working correctly but the May update fixed it.
Dataman100 said:
As indicated in my OP, cable charging works fine every time. The phone doesn't even get warm. It's only wireless charging that's an issue, and not every time I try to charge it wirelesly. It's like the phone decides to stop accepting the power, and it starts to heat up because of it.
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Click to collapse
May be a hardware failure in the phone or stand.
Remove a case if it has one and try.
C ports generally last for thousands of charge cycles and cable charging is better for the battery, produces less heat.
FoneWatcher said:
I take it you don't have a second wireless stand to rule out if it's the phone or your STand 2 that's behaving badly?
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No, unfortunately I only have one stand. I'll keep trying things to see if I can narrow down the exact situation when it occurs. I was mainly checking to see if anyone else had something similar happen and there was a quick fix.
blackhawk said:
C ports generally last for thousands of charge cycles and cable charging is better for the battery, produces less heat.
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Yeah, and I've always used cable charging on all my phones in the past with no issues. I thought the stand was cool in that it could fast charge and keep the phone upright so it's easy to read in the middle of the night. I'd really like to keep using it. It was stupid expensive and I'd hate to let it go unused for that price.
Thanks!
Dave
I've been experiencing similar problems with my Stand. Sometimes it charges normally, sometimes it charges REALLY, and I mean really slow... And sometimes I get the "Not charging" message for whatever reason.
I think it's gotta be an issue with the adaptive charging on the Pixel 6 Pro, because every time I put my other phone on the stand, my S21U, it charges without any issues.
Dataman100 said:
Yeah, and I've always used cable charging on all my phones in the past with no issues. I thought the stand was cool in that it could fast charge and keep the phone upright so it's easy to read in the middle of the night. I'd really like to keep using it. It was stupid expensive and I'd hate to let it go unused for that price.
Thanks!
Dave
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Yeah, I feel you. It could be firmware, a SEU which are rare but do happen. A reflash would fix it if so. Probably not worth the trouble to try and more likely to be hardware.
Cable charging be the best plan for now I think.
The old micro connectors were horrible and invariably would fail. The C connectors are much more robust. This N10+ is heavily used and the C port jack is still tight and has well over a thousand cycles plus a few drops and pulls. Even the original cable is still AOK.
Just came across this thread while looking for similar problems on my P4 with a 1st Gen stand. The phone showed the normal 'xx% charging wirelessly' display then at 79% it changed to simply '79%'. After a while the message went back to 'xx%charging wirelessly'. I took the phone off the charger and using a utility app called 'inware' I looked at the battery temp which was at 41.5C/106F.
So I'm guessing that the phone will stop charging when the battery gets hot and resume when it cools down a bit. What is 'too hot' and when does it cause damage, I have no idea. Google told me in a chat session the other day that it's perfectly acceptable to leave the phone on the stand all day. Personally, I take it off at about 80% charge which lasts me all day.
Mine also has this behaviour, taking it off and placing it back on continues to charge
I just sent my stand back for similar reasons - not good when a $12 Qi charger from Amazon was doing a better (and faster!) job charging.
I sent mine back too & am now using a charger that I bought at IKEA for £5. It's a shame as I thought that Google would have made more effort to integrate the charger & phone. Oh well, bling gone!