[Q] How on earth can the device's battery decrease while charging? - Nexus 7 (2013) Q&A

Hi everyone!
As you can see on the attached picture the device's battery life was decreasing while charged, i was playing a game with 40% brightness.
Can someone explain ne this, please?
Thank you!

Depends on what game you're playing. Asphalt 8 while charging for me only slowly charges, 1% every 15 minutes or so. If the game is using more resources faster than the battery can charge, it will decrease.
Sent from my Nexus 7 using xda app-developers app

hobuci said:
Hi everyone!
As you can see on the attached picture the device's battery life was decreasing while charged, i was playing a game with 40% brightness.
Can someone explain ne this, please?
Thank you!
Click to expand...
Click to collapse
Not sure if that is totally unreasonable. 40% is significant in addition to gaming with a game that requires significant power seems OK.

I have the problem sometimes of my nexus 7 losing battery while charging sometimes as well, but I never use my stock charger and don't know where my original micro usb cable is. I have found that different Micro USB cables can have a major impact on charge rate. When the Galaxy S3 came out I noticed that with the stock charger and stock cable, I lost battery anytime I used my phone even while charging. My suggestion to you is to install the app current widget and put a widget on your home screen to see the amount of charge your device is receiving while charging. Yes you cannot do this while in a game, but you can at least test out different cables and chargers you may have to see if maybe one of those hardware pieces is the culprit.

Related

[Q] Battery life and Android OS drain bug

For anyone using Android 4.0, specifically running it as stock on this device, do you experience the same battery drain issues commonly seen in Gingerbread? You know the one where the process Android OS uses an ungodly amount of battery life through suspend and events/0?
been playing around with the phone for the past 8 hours from a full charge, nothing unusual about the battery
tomorrow with normal usage after the full charge i'll get a better view about it
h9290 said:
been playing around with the phone for the past 8 hours from a full charge, nothing unusual about the battery
tomorrow with normal usage after the full charge i'll get a better view about it
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Does it take long to charge the battery? Like the nexus s. If its a slow charging phone like the nexus s then im not buying.
didn't think that fully charging it toke that much
i usually leave the phone charge when i go to sleep
removed from a 100% charge at 9:15am GMT
I own Nexus S too and experience the same, slow charging ... using the charger from Samsung (default).
So, I changed the charger and I use the one that came with the HTC Desire
And it is much faster, like 3 hours to go fully charged compared to more than 5 hours.
So, there you go, change your charger!
sheek360 said:
Does it take long to charge the battery? Like the nexus s. If its a slow charging phone like the nexus s then im not buying.
Click to expand...
Click to collapse
I can usually get my nexus S to a full charge in an hour or two, depending on how empty I let it get. It's fast enough that if I've forgot to charge & need to go out a 20 minute blast will get me through the evening.
No idea who made the charger.. I've got a house full of the damned things these days
So what about life time?
Just check your chargers mA output, the higher the nr, the faster the charge. A computer USB port outputs 500mA wich gives a rather slow charge normal mA on chargers is around 700mA -> 1A. Keep in mind though that higher mA resulting in a faster charge puts more stress on your battery and it WILL get hotter, to high numbers can even damage your battery so be carefull and monitor your batterys temp when trying a new charger!
Sent from my X10i using xda premium
7:30 and the battery is on 58%
been using it since 9:15 off charge. browsing/gps/wifi and browsing
h9290 said:
didn't think that fully charging it toke that much
i usually leave the phone charge when i go to sleep
removed from a 100% charge at 9:15am GMT
Click to expand...
Click to collapse
h9290 said:
7:30 and the battery is on 58%
been using it since 9:15 off charge. browsing/gps/wifi and browsing
Click to expand...
Click to collapse
Wow! That sounds really really good tbh! Makes me really happy to hear :-D
Sent from my X10i using xda premium
Slightly off topic, but regarding charging...
Does charging via a "weaker" USB port damage the battery? For example, at work, the only USB port available is an old iMac keyboard USB port, and it's "weaker" in the sense that when I connect it to my phone, the computer tells me "A USB device needs more power.... "
I understand this might charge the battery slower, but does it cause any damage to it, short or long term?
onthecouchagain said:
Slightly off topic, but regarding charging...
Does charging via a "weaker" USB port damage the battery? For example, at work, the only USB port available is an old iMac keyboard USB port, and it's "weaker" in the sense that when I connect it to my phone, the computer tells me "A USB device needs more power.... "
I understand this might charge the battery slower, but does it cause any damage to it, short or long term?
Click to expand...
Click to collapse
As far as i know USB before 2.0 needed external power supply, meaning your device should not be able to charge from this type of USB. But to answer your question, no, you can not damage an electric device by undervoltage or lower Amps.
Sent from my X10i using xda premium
Hope to get the GN soon.
Like to see and test how the charging is with different chargers.
Have seen slow charging ( also better hold out ) with different chargers.
My best charging is stil with the original desire ( charges quick and battery holds longer ).
Galaxy S plus is slow, wildefire also slow...

Am I damaging the battery?

so I got Need for speed for my Xperia S (great game by the way, would recommend) the only problem is it is un UTTER battery drain, I'm talking rapid draining even having the screen brightness on low. Do you think the battery is getting damaged by my heavy use in this way? I'm charging it to full, playing it for a good hour and then it needs to be recharged so I plug it in.
cheers
adsada arc said:
so I got Need for speed for my Xperia S (great game by the way, would recommend) the only problem is it is un UTTER battery drain, I'm talking rapid draining even having the screen brightness on low. Do you think the battery is getting damaged by my heavy use in this way? I'm charging it to full, playing it for a good hour and then it needs to be recharged so I plug it in.
cheers
Click to expand...
Click to collapse
No you are not damaging the battery. Hd games drain your battery. Dont worry it happens with every phone. Please post questions in question and answer section.
Sent from my LT26i using xda app-developers app
How about if I play while the phone is charging, does this affect it in any way, like how with a laptop you should take out the battery if its plugged into the wall to extend the battery's life?
adsada arc said:
How about if I play while the phone is charging, does this affect it in any way, like how with a laptop you should take out the battery if its plugged into the wall to extend the battery's life?
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Click to collapse
No it wont affect your battery...I have been doing that for the past 10 months
Sent from my LT26i using xda app-developers app
It's a difficult question. From one perspective it's better to keep the phone plugged in because a Li-ion battery has a finite amount of recharging cycles. The worst thing you can do is to completely discharge your battery, then completely charge it again and so on several times. Which is what you've been doing and these are wasted recharge cycles.
But constantly charging your phone will also make it hotter and that combined with an intensive game will make your phone too hot, which might result in some components overheating and a reduced life expectancy.
So I'd advice to keep your phone plugged in if possible, but don't play for hours.
When you compare to laptops, it's indeed better to remove the battery when you're plugged into the wall (keep in mind that the battery doesn't lose its charge though, there's nothing worse for a Li-ion than being completely empty). But there's no phone you can run without a battery so you can't do that . It's also a question of luck. I never remove my laptop's battery and it still easily lasts 2 hours after having it for 2.5 years and using it a LOT (when plugged in mostly). It was just a cheap laptop with a 6 cells battery. Most of my friends that have a laptop that old or older (and also more expensive) can barely keep it charged for more than 10 minutes now.
No,
nowadays you can't damage your battery in any way as I know.
But it is recommended to charge your phone to 100% and turn all notifications off then let it on sleep mode till your Phone is going off by itself.
This doesn't improve the Battery lifetime or something like that but it is recommeded
thanks for the advice everyone

[HELP] Battery charging while using phone SGH i747

Hi
I have problem with charging while using my phone. It simply doesn't charge. Is it normal? I was used to charge while playing some game or browsing net on wifi. I am on PACman ROM v21 and KT747 Kernel(3.14.2013). Thanks for help
are you using the charger that came with your phone? And the battery too? It should charge slower during use than if it is off and charging due to the screen taking alot of power. But it shouldn't not charge at all unless its under a huge heavy load. Check your battery and charger.
Hit thanks if I helped.
yeah, I use original battery and charger too... When connected charger and browsing or playing games it's !discharging! This is happening for 3 weeks now I guess.
wOrHeR SvK said:
yeah, I use original battery and charger too... When connected charger and browsing or playing games it's !discharging! This is happening for 3 weeks now I guess.
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Click to collapse
Sounds like your battery might be bad. If you have a spare battery, try it and see if the problem persists. If you don't, download some kind of battery monitor app and see if it gives a bad status for your battery.
app called Battery gives battery status Good and Gsam Battery monitor too. Could it be something else? And I don't have spare battery, maybe when I meet my cousin with SGS III...

Very slow charging...

Is anyone else experiencing this problem or is it just how long it takes to charge this tab?
Plugged into the charger for an hour with the tablet off and it's only charged 15%. So it's going to take 6 and a half hours to fully charge?
Also the battery seems to die pretty quickly from just normal Web browsing. From 40 to 15% in an hr.
Battery life / charging / Simpsons tapped out lags / lots of stuttering with TouchWiz...
I want to be happy with this tab but it hasn't been easy
My battery life improves after a few charging cycles. I found Samsung charger is slow but not too bad. Mine charges about 30% an hour with tablet powered on but not in use. It goes a lot faster when using Nook HD charger, though both have 2.0A output.
My Note 3 charges so much faster that it's not even funny. And considering it's 10000 mAh...
Yep charges super slow. No idea why. Also drains super fast surfing web. People talk about getting 8 hours on this. Im lucky to get 4 but then again i like brightness high.
Use a launcher to improve Touchwiz stutter (funny that some folks complain about this stutter thing - on 10.5 have never experienced it even without a launcher).
cyi1 said:
Is anyone else experiencing this problem or is it just how long it takes to charge this tab?
Plugged into the charger for an hour with the tablet off and it's only charged 15%. So it's going to take 6 and a half hours to fully charge?
Also the battery seems to die pretty quickly from just normal Web browsing. From 40 to 15% in an hr.
Battery life / charging / Simpsons tapped out lags / lots of stuttering with TouchWiz...
I want to be happy with this tab but it hasn't been easy
Click to expand...
Click to collapse
Try to power down for a few minutes and then see if there was a difference after you powered on.
You can also check the task manager to see what is running on your system.
Sent from my HTC6435LVW using Tapatalk
Peter234 said:
Try to power down for a few minutes and then see if there was a difference after you powered on.
You can also check the task manager to see what is running on your system.
Sent from my HTC6435LVW using Tapatalk
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Click to collapse
I always kill apps when I'm done with them. Guess I'll give rooting and removing all the Samsung apps a shot.
I got some decent battery life out of mine when I had it about 6-8 hours mixed use. Def noticed a big drop when surfing the web using white backgrounds. Charging also was painfully slow on mine I think around 3-4 hours from 0 to full charge for me when not in use.
It's been a staple of their latest tablets unfortunately. Just make sure you're using the stock cable/adapter as some of the aftermarkets don't have enough power. For example, I have a 10 foot cable but it only puts out one third the power then the included power cable using the same adapter.
Sent from my SM-T800 using Tapatalk
Try using Galaxy Charging Current lite it helped me. I was using a Anker intelligent charger and it took forever to charge it. App showed current at 350-450mA. Used Samsungs and it showed 1800mA.
I have to agree, just received the tablet today albeit stressed out to the max because the fedex guy marked it as delivered when it wasn't to squeeze out extra minutes for a break (seriously?!?) I thought it got ripped off! So, back to the battery, I turned on the tab, beautiful this thing is by the way...and was at 62% out of the box. I began charging it using the included power cable and adapter, and 3 hours later I realized just how long this was taking to charge. Granted I was using it practically the whole time, I am hoping a higher amp charger will fix this for me.
Yup it took me 5.5 hours to charge fully. I'd be lucky if i get 5 hours of usage before the juice runs out.
8.4 inch charges fines here. 2.5 hours max, powered on or off.
Sent from my SM-G900F using Tapatalk
Charge time isn’t particularly fast on any of the devices, but the 10.5-inch model in particular takes a while to make it to a full charge. The 10.5 will reach a 90% charge in just under 4 hours, but to make it to 97% takes another hour and the last 3% takes another 42 minutes on top of that. Usable charge time is competitive, but if you’re obsessive about always charging to 100% the 10.5-inch model does take a while to get there.​​
http://www.anandtech.com/show/8197/samsung-galaxy-tab-s-review-105-84inch/3
BarryH_GEG said:
Charge time isn’t particularly fast on any of the devices, but the 10.5-inch model in particular takes a while to make it to a full charge. The 10.5 will reach a 90% charge in just under 4 hours, but to make it to 97% takes another hour and the last 3% takes another 42 minutes on top of that. Usable charge time is competitive, but if you’re obsessive about always charging to 100% the 10.5-inch model does take a while to get there.​​
http://www.anandtech.com/show/8197/samsung-galaxy-tab-s-review-105-84inch/3
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Click to collapse
Mine seems to charge quicker than what is stated on that chart. Will have to time it from 0% next time.
Sent from my SM-G900F using Tapatalk
The charger that comes with the tab s is the same all new galaxy devices are shipping with. They do 5.3volts instead of just 5 volts. You will get a little quicker charge with the stock charger.
I get a legit 6-8 hours SOT mixed use
Sent from my SM-T800 using XDA Premium 4 mobile app
Slow charging NO charging
I hope this is okay to post here since it is a charging problem. I am on my third SM t-800. Mine stop charging all together! First one charged one time then stopped. Second on would not charge at all, It used up its factory 45% that it shipped with and nothing more. Third one was best by far and charged untill this moring and has stopped. Now, here are the details. I checked the cord by pluging into my note 3 on all of them. Infact my wifes Note 2. They charge fine. I don't have my ameter to check ampers but they clearly are delivering volts to the other devices. Now get this. I have a Bose external speaker that uses a mini usb. I plugged that one into the tablet and it is charging right now. Of note I had a concern that maybe some how the socket was bumped on the tab and somehow messed it up. But that is a long shot since the first two were used while only on a desk. So this third one has been supper "babied". I'm so frustrated right now.
BTW my first tab charged very slowly. 6-7 hours or so. Maybe more? I feel at this point the pins in the tab are not making contact. Any thoughts?
JL
---------- Post added at 02:10 PM ---------- Previous post was at 01:28 PM ----------
Just got of the horn w/ Samsung. Got issue taken care of. In short, the phone tech mentioned ampreage and I yanked the AC transformer off the wall and checked it. The factory transformer is 5.3v. 2.00ampers. In the dark last night i plugged into a "white" charger. An ipad charger I think, that is 5.2v. 2.4amp transformer. I switched the cord to the corect transformer and the tab is charging. Apparenty the chip in the tab was protecting the unit from over ampreage and it shut down charging. I know better than this and feel like a fool but thought I should let you all know what happened. This brings up a issue. Slow charging.... could the slowness be caused by a transformer with say 1.5 amps? Maybe the tab will let it charge but at a slow rate? Just a thought. Moral of the story for me? Plug in the tab in a lighted area, and into the correct charger.
Signed,
Embarrased
Charging is a little slow, but the battery is large, so i accept that, but when it's charged 100% it lasts for ages. Faster charging shortens the life of the battery anyway. I could easily get 7- 8 hours constant surfing out of this tab. I've been on it now for over 2hrs surfing and it's used 13% . I always use auto brightness.
I get 6-8 hrs of mixed use, YouTube, surfing the Web and some movies with a little gaming. It takes me around 4 hrs to fully charge. Battery life is average. I'm using a 10.5 LTE.
Sent from my SM-T805
ashyx said:
Faster charging shortens the life of the battery anyway.
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Click to collapse
Technically this is not true at all. It is heat that hurts batteries. You can charge as fast as you want as long as you keep it cold. That being said, Lithium Ion batteries will take a much faster charge rate and not cause heat. You could easily charge this battery in 2 hours, but the common chargers aren't that powerful.

Inconsistent Charge Rates using a variety of different cables and chargers.

I've had my Nexus 5x for a couple months now, I bought it through amazon refurbished. (My girlfriend has the same device, she bought hers brand new. Her's is the international model though) Here's a listing of the charging cables, and chargers that I have:
Anker Quick Charge 3.0 and USB Type-C 24W USB Wall Charger http://amzn.to/2mitz3n
Anker A to C 6ft cable http://amzn.to/2lbw2HW
Anker 24W Dual Port Charger http://amzn.to/2mx16Tt
(I bought the a to c cable to be able to connect to pcs or whatever, and the charger i had for my Nexus 5 and other micro usb devices.
Standard Google Charger https://store.google.com/product/usb_type_c_18w_power_adapter
Obviously the middle item there doesn't charge at full speed, it isn't intended to. But my charge rate using any of those devices is still over all over the place within each of those items specifications. So it isn't likely that is a cable or charger issue which is normally the issue when someone has charging rate problems. yes i know the charging rate slows down as it reaches higher percentages to prevent over charging and other types of battery damage.
My phone can be down to 20% battery when I plug it in and it could start charging at 110mA or 2000mA+. Whatever rate it is though, it isn't going to stay that way for very long. If it starts low, then it might work its way up into the 700-900s slowly or to around 1000mA. If it starts up high 2000mA it'll likely start working its way down slowly into the 1000-1800mA range.
Sure charging at slower rates helps the battery to last longer, but when i have no control over this, and at times it discharges faster than it is even charging it is bad. I can actually deplete battery sometimes, if its charging while video chatting. Albeit very very very slowly, but still. The battery life and range seems to be very good aside from this charging issue. The connection port on the phone seems really quite solid as well and wiggling the cord doesn't seem to affect the charge rate as best as I can tell.
My girlfriends 5x charges in about half the time that mine does, or sometimes its even worse, i just have to pay attention to what it is doing when i plug it in. So my question is, is this a battery problem or is there something else going on with the phone? What is it that throttles the charge rate down as the battery % gets higher? Is there a chance this could be faulty and causing it to be all over the place like this? Any ideas about this would be very helpful thanks in advance.
Ps: I really do love the device, it works great, I have no issues with it beyond the charging rates that can be all over the place. I can go from 10% battery to 75% sometimes in half an hour or so. Then i get times where it takes well over an hour for that much.
(I use ampere to measure the charge rates)
Charge rate goes down with higher battery temperatures. Let the device cool down a bit before plugging in, also keep the screen off to allow it to charge at full speed.
The charge will also slows down as it fills up, the last 10% will take the longest.
bblzd said:
Charge rate goes down with higher battery temperatures. Let the device cool down a bit before plugging in, also keep the screen off to allow it to charge at full speed.
The charge will also slows down as it fills up, the last 10% will take the longest.
Click to expand...
Click to collapse
I appreciate you taking the time to respond, since you are the only one thus far. But as I said I'm aware of the charging slowing down for those reasons, and I've got another device to compare to. It isn't the same, and the device isn't hot.
There is no problem with your battery. The phone is badly designed. Unfinished SoC combined with a small battery and a big screen. Your money is better spent on something else.
Sinistersky said:
There is no problem with your battery. The phone is badly designed. Unfinished SoC combined with a small battery and a big screen. Your money is better spent on something else.
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Click to collapse
He's not talking about battery life. He's talking about charging times.
Personally, no issues with charging here. Always goes 15% to ~90% in 60 minutes with the stock charger.
Sent from my Nexus 5X using Tapatalk
EeZeEpEe said:
He's not talking about battery life. He's talking about charging times.
Personally, no issues with charging here. Always goes 15% to ~90% in 60 minutes with the stock charger.
Sent from my Nexus 5X using Tapatalk
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Click to collapse
"...So my question is, is this a battery problem or is there something else going on with the phone?"
Also, I have no problems charging it either.
Sinistersky said:
"...So my question is, is this a battery problem or is there something else going on with the phone?"
Also, I have no problems charging it either.
Click to expand...
Click to collapse
Yet you talked about unfinished SoC and small battery. ? If anything, small battery would be charging faster.
Sent from my Nexus 5X using Tapatalk
Sinistersky said:
"...So my question is, is this a battery problem or is there something else going on with the phone?"
Also, I have no problems charging it either.
Click to expand...
Click to collapse
I don't have any issues with my battery discharge rate. For what it is, and what I use if for I'm happy with it. And from what I've read about the usages from others I think I have no issues there compared to others. I'm just referring to the charging rates, the way it charges
EeZeEpEe said:
Yet you talked about unfinished SoC and small battery. ? If anything, small battery would be charging faster.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
But due to an unfinished and rushed SoC, it doesn't charge faster. The charge rate of this device is limited to 40% of it's intended charge rate.
Sinistersky said:
Your money is better spent on something else.
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Click to collapse
Fairly pointless comment considering I've got one already, it isn't me asking if I should buy one. Point taken though that you aren't happy with the device
ideaman924 said:
He says he already owns the device. No point in telling him how poor his purchase decision was. And it wasn't that poor of a decision considering how good it is. It stands up fairly well to my abuse and the small screen is OK to grip.
OK, a serious question:
1. Charging speed is affected by Charger (the thing that plugs into the wall), the Cable (how long or thick it is), and the Battery (how hot, how full it is). This is the basic, moving on.
2. Sometimes the C port is buggy and doesn't correctly detect the maximum amount that a cable+charger combo supports. Download Ampere or some other current measuring tool like GSam (although I never bother with GSam, Ampere is awesome), and make sure the max amperage is 3000 mAh. Anything lower than that means you have a low-powered charger, a less-than-optimal cable, or a hot or near-full battery. I recommend plugging it in at around 50% to make sure the near-full charge speed drop doesn't affect anything during your tests.
3. If that doesn't work, replace the battery. Final line advice.
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He's already using Ampere to measure and has 3 chargers to compare with.
Sent from my Nexus 5X using Tapatalk

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