Hi all,
My dear HTC One M8 took an unfortunate dive into water recently, I got it out pretty quickly (it was submerged) and shook it dry as fast as I could, then tore the unit down to get the battery disconnected as fast as I could (Screen jumped on, and vibrate motor was on constantly).
After getting the battery disconnected, stripping it down and drying it out, cleaning, etc.
I ordered a new battery and USB charge board as knew those would be most likely culprits.
Anyway, left existing USB and battery in, and after a few days of ensuring dry, etc, connected battery up and usb to charge, phone screen lit up and showed battery with electrical lightning symbol, a few seconds later then the battery with red exclamation mark (point) on screen.
Using my USB voltage/current meter I saw that battery charge current went to around 0.2amps but stayed constant, so I left it to do it's thing.
Powered it on and it's working! All good, touch working, all functions. However battery has an exclamation mark inside it when booted, and if connected to charger whilst phone is on charge current goes up when screen is on, etc (As though the phone is pulling current from the charger) but when idle the charge current drops to 0.
So it won't charge whilst turned on.
I then changed the battery and usb charge port. SAME, no difference. I've even tried a 3rd battery to be sure and it's the same, so I don't think it's the battery or the
usb charge port itself.
So debugging it, using "Ampere" app to see battery state. It says Unknown and often has unusual temperature values (- values or very low). Battery status is UNKNOWN.
I've connected up on adb to take a look and several things are odd, if I pull the battery stats:
Code:
130|[email protected]_m8:/ $ dumpsys battery
Current Battery Service state:
AC powered: false
USB powered: true
Wireless powered: false
Overload: false
USB overheat: false
Extension: 0
PowerJacketExist: false
PowerJacketStatus: 0
PowerJacketLevel: 0
PluginStatus: true
Unsupport Charger: false
status: 1
health: 2
present: true
level: 87
scale: 100
voltage: 4120
temperature: 288
technology: Li-poly
[email protected]_m8:/ $ dumpsys batteryproperties
ac: 0 usb: 1 wireless: 0
status: 1 health: 2 present: 1
level: 87 voltage: 4187 temp: 287
[email protected]_m8:/ $
So the status is 1 = Unknown.
Does anyone know how I can 'influence' this, even by forcing it using dumpsys to set a variable?
I've tried all the usual tricks, power off, hold all buttons, power on holding for 2-3 minutes to reset battery, delete the batterystats.bin under recovery, etc.
Any ideas?
By means of an update, it seems I can charge the phone, BUT it has to be turned off. When turned off, plug the charger in you get the charge symbol which then goes to the battery with red exclamation mark in it, but it continues to pull around 0.5amps and charges fully.
When the phone is turned on and booted up, plug the charger in and the battery exclamation mark appears, charge goes on 0.3amps then drops to 0.01amps and sits there so doesn't pull charge.
So that takes me over to something else, what is it in the o/s that's controlling charge rate?
andyb2000 said:
So that takes me over to something else, what is it in the o/s that's controlling charge rate?
Click to expand...
Click to collapse
I'm not really a "hardware" guy. But just throwing out what I can, hoping it helps in some way.
It's something on the phone (exactly what, I don't know) in conjunction with a "smart" chip on the battery itself. So it's possible you just have a bad battery (pretty common for a water damaged phone, from what I've heard). In which case, a malfunctioning battery is not something to trifle with. An overcharged battery can lead to fire or explosion! And I'm not sure how far you want to go replacing the battery on a phone that is over 4 years old; when it might not completely fix the problem (may also be a short or other damage to the phone's board, etc.).
Hi,
Thanks for the information, yep I do a lot of electronics and dealt with Li-Ion batteries for some time.
I have replaced the battery with two other alternatives as I also suspected the Li-ion control circuitry being the source of the issue, but alas it isn't. Voltage on the li-ion cells is fine, and the charge circuitry is responding correctly with voltage and level cutoffs in the correct ranges.
I also replaced the USB charge port which handles the charge regulation technology for the phone also, but to no avail.
My current focus is on the main circuit board, as I believe there is a temperature sensor used to monitor the battery temperature and this is giving me unusual readings which I'd suspect the O/S is controlling charge due to that.
Cheers for the input though!
Related
This is going to sound ridiculous, but I have to say it anyway.
I have a Samsung Galaxy S2 (SGH-i777), and I have two charging cables. A U9, and a U2.
When I charge the phone overnight with the U9 cable, I get a 100% rating on the charge, but the battery dies VERY fast. I unplug the phone at 7am, and it's down to 70% by 10am with very little use.
When I charge the phone overnight with the U2 cable, I get a 100% rating on the charge as well, but then the battery dies very slowly, the way I prefer it. I can use the phone moderately all day, and still have a good 30-40% when I get home after 5pm.
Clearly, I use the U2 cable, as this achieves my goal. My question is, why does it work this way? Is there something wrong with the U9 cable? Does it charge the battery differently than the U2?
Check what kind of charging the phone recognize "USB" or "AC". If it is USB the charging is slower (450mA) when AC is faster (650mA).
flash608 said:
Check what kind of charging the phone recognize "USB" or "AC". If it is USB the charging is slower (450mA) when AC is faster (650mA).
Click to expand...
Click to collapse
I'm not quite sure what you mean. Is there a place in the menu of the phone to check for this?
I used to use the wall-outlet adapter with the U9 cable. Now I am using the same wall-outlet adapter with the U2 cable.
It`s hidden in Settings -> About Phone -> Status -> Battery Status (AC/USB)
Shibblet said:
I'm not quite sure what you mean. Is there a place in the menu of the phone to check for this?
I used to use the wall-outlet adapter with the U9 cable. Now I am using the same wall-outlet adapter with the U2 cable.
Click to expand...
Click to collapse
When you connect the usb cable the phone says that is connected like a media device and a usb symbol appear in status bar and notification area, it means that are charging at 450 mAh (like usb connected to PC), but if only see a charging battery indicator then is charging at 650 mAh (like Power AC Adapter).
But I really dont know if the charge duration is affected, maybe is overcharging your battery. Try this, charge until 100% with both, but disconnect it when the phone says that charge is complete and try. Maybe with the time the battery is overcharged and has more battery with one of the cables.
At a molecular level, the slower charging is more thorough and actually deposits more charge (energy) into the battery, which is why a slow charge rate results in a better performing cell or battery. Remember, batteries (or cells; a battery is just a collection of cells) change energy from chemical to electrical when providing power, and accept energy when being charged by converting electrical energy to chemical energy. That chemical change doesn't happen instantaneously, and is why a slow charge can actually raise a cell or battery's energy level higher.
Generally, the charger measures the charge state of the battery by the voltage of the cell or battery, and charging slowly allows the charge to more thoroughly dissipate through the cell. Rapidly charging, on the other hand, builds potential (voltage) quickly, but the quick charging doesn't allow the chemical change to occur thoroughly throughout the cells, and misleadingly indicates a higher voltage (charge state) than has actually occurred.
Think of the game of Tetris: When the blocks (incoming electrons) are falling slowly, it's easy to pack them tightly and fit more into the play area (battery). When they're coming in quickly, eventually you become unable to fit them all tightly without leaving voids, and the height of the stack (perceived charge level, or voltage) reaches the threshold without being fully packed (charged).
I hope this helps, four years after the question --Mike Jernigan, Greensboro
EightOhMike said:
At a molecular level, the slower charging is more thorough and actually deposits more charge (energy) into the battery, which is why a slow charge rate results in a better performing cell or battery. Remember, batteries (or cells; a battery is just a collection of cells) change energy from chemical to electrical when providing power, and accept energy when being charged by converting electrical energy to chemical energy. That chemical change doesn't happen instantaneously, and is why a slow charge can actually raise a cell or battery's energy level higher.
Generally, the charger measures the charge state of the battery by the voltage of the cell or battery, and charging slowly allows the charge to more thoroughly dissipate through the cell. Rapidly charging, on the other hand, builds potential (voltage) quickly, but the quick charging doesn't allow the chemical change to occur thoroughly throughout the cells, and misleadingly indicates a higher voltage (charge state) than has actually occurred.
Think of the game of Tetris: When the blocks (incoming electrons) are falling slowly, it's easy to pack them tightly and fit more into the play area (battery). When they're coming in quickly, eventually you become unable to fit them all tightly without leaving voids, and the height of the stack (perceived charge level, or voltage) reaches the threshold without being fully packed (charged).
I hope this helps, four years after the question --Mike Jernigan, Greensboro
Click to expand...
Click to collapse
4 year? You waited 4 year ???
I'm curious if anyone has been using Qi charging with their TabPro? Anyone's comments would be appreciated.
I used a micro-usb Qi coil receiver between my TabPro 8.4 and the Poetic case for a few weeks without issues.
But then something happened to cause the Qi charging pad to overheat. I ended up having to have the TabPro 8.4 replaced by BestBuy as the TabPro would no longer charge at all, even trying different micro-usb cables and 2.1 amp power adaptors. What was even stranger, was the battery continued to drain even after powering the TabPro off! I'm puzzled as to what was damaged, but the end result was the battery went from 41% charge to 7% charge overnight even though it was powered off (not sleeping, but powered off) and not connected to a charger. When I discovered it was at 7% I removed my account info, but even with the charger plugged in, the battery went down to 3% while working on the TabPro. When I checked on it an hour latter it was dead. If I plugged in the charger, after about 20 seconds it would flash the green battery for about a second, then it would go out. No boot, no charging, even after leaving it charging for 24 hours.
So I'm very reluctant to try to use Qi wireless charging on my replacement tab. I suspect the Qi charging pad failed and overheated. There is a spot about the size of a dime where the plastic partially melted on the charging pad. The Poetic case and the TabPro look fine, and the charging pad still acts like it is working. Very puzzling. Any ideas or cautions?
ron12 said:
I'm curious if anyone has been using Qi charging with their TabPro? Anyone's comments would be appreciated.
I used a micro-usb Qi coil receiver between my TabPro 8.4 and the Poetic case for a few weeks without issues.
But then something happened to cause the Qi charging pad to overheat. I ended up having to have the TabPro 8.4 replaced by BestBuy as the TabPro would no longer charge at all, even trying different micro-usb cables and 2.1 amp power adaptors. What was even stranger, was the battery continued to drain even after powering the TabPro off! I'm puzzled as to what was damaged, but the end result was the battery went from 41% charge to 7% charge overnight even though it was powered off (not sleeping, but powered off) and not connected to a charger. When I discovered it was at 7% I removed my account info, but even with the charger plugged in, the battery went down to 3% while working on the TabPro. When I checked on it an hour latter it was dead. If I plugged in the charger, after about 20 seconds it would flash the green battery for about a second, then it would go out. No boot, no charging, even after leaving it charging for 24 hours.
So I'm very reluctant to try to use Qi wireless charging on my replacement tab. I suspect the Qi charging pad failed and overheated. There is a spot about the size of a dime where the plastic partially melted on the charging pad. The Poetic case and the TabPro look fine, and the charging pad still acts like it is working. Very puzzling. Any ideas or cautions?
Click to expand...
Click to collapse
The only thing I can think of is maybe the Qi charging pad failed to deliver 2.1 Amps to correctly charge it (I don't think they even make 1 Amp coils yet? - though I could be wrong.) , maybe the tab went into charging mode but it was really discharging since not enough current was going in that it needed to charge + keep the tablet running so in the end maybe it destroyed the battery since it went completely flat which is usually a bad thing for l-ion battery's
Usually when android says the battery is at 0% the battery really has about 20% remaining for protection of the battery and preventing it from going completely empty (l-ion can really be drained to 2.5v but android reads 0% around 3.4v or 3.2v if i remember correctly as protection from flat-lining the batt), however if it was under charging mode I'm sure it would override this as it thinks it's plugged in so it's not paying attention to the battery, but really the batt is draining to compensate for the underpowered charger, that would be my guess maybe constantly using the Qi charger the battery circuitry changed the battery status from lv 2 (good) to ~ lv 4 (bad) since it wasn't receiving the current it was supposed to and the circuitry thought something was wrong with the battery cells or the battery just went bad since it was always under a charging / discharging state never reaching 100%.
on a side note
I found this tablet to be very fussy when using other chargers then its official one, I have tried several chargers and they just dont function like the stock one for example
HP Touchpad charger 5.3v - 2.0A - Very high quality charger and even won some awards for beating out other chargers - I found this would sometimes not fully charge the tablet to 100% it would idle around 98% (I have two of these chargers) - Charge current starts around 1800 mAh drops to 200 mAh when battery gets full don't think its enough to top it off. (charges at 5v)
10,000 mAh Power-bank (5v , 2.0A), found out this would not fully charge the tablet either it would get to 80%, upon further inspection the 2A port was only delivering about 1 Amp of current according to my amp reader (voltage drop to 4.98)
Samsung official charger (5.3v 2.0A)- though seems to start at a pretty high 5.60 volts (higher then other chargers) , and charges at about 1870 mAh , always reaches 100% with this charger. (I have two of these chargers since I bought another one as backup - both do the same thing)
otyg said:
The only thing I can think of is maybe the Qi charging pad failed to deliver 2.1 Amps to correctly charge it (I don't think they even make 1 Amp coils yet?
. . .
Usually when android says the battery is at 0% the battery really has about 20% remaining for protection of the battery and preventing it from going completely empty (l-ion can really be drained to 2.5v but android reads 0% around 3.4v or 3.2v if i remember correctly as protection from flat-lining the batt), however if it was under charging mode I'm sure it would override this as it thinks it's plugged in so it's not paying attention to the battery, but really the batt is draining to compensate for the underpowered charger, that would be my guess maybe constantly using the Qi charger the battery circuitry changed the battery status from lv 2 (good) to ~ lv 4 (bad) since it wasn't receiving the current it was supposed to and the circuitry thought something was wrong with the battery cells or the battery just went bad since it was always under a charging / discharging state never reaching 100%.
on a side note
I found this tablet to be very fussy when using other chargers then its official one, I have tried several chargers and they just dont function like the stock one for example
HP Touchpad charger 5.3v - 2.0A - Very high quality charger and even won some awards for beating out other chargers - I found this would sometimes not fully charge the tablet to 100% it would idle around 98% (I have two of these chargers) - Charge current starts around 1800 mAh drops to 200 mAh when battery gets full don't think its enough to top it off. (charges at 5v)
Click to expand...
Click to collapse
That could be the case. Yet, for two weeks, the Qi charging had no problems taking the charge to 100%. It would charge a bit over 15% an hour. The Galaxy Charging Current app reported between 670 and 750ma charging current using Qi charging.
At this point I'll likely never know, but it could be the battery itself simply failed on the tablet. My question is mainly to see if anyone else has used Qi charging, and what their experience is. How can I display the battery status (you referenced lv 2 (good) to ~ lv 4 (bad))? The battery app from the Play Store does display "battery health" but I've only seen it say "Good".
On your side note, I occasionally plug the tablet into the USB port on my computer (measures 5.10V), and it charges at about 10% an hour while sleeping, and has repeatedly charged the battery to 100% when I leave it connected. I have an EnrePlex Jumper Prime 4400mAh that measures 5.18V, and charges at 1.5A. It has charged the battery to 100%, though will run out of juice if the battery is lower than 40% before I use it, it measures 5.18V.
I have an old Galaxy Tab 2 10.1 that I often charge via the computer's USB port, although it takes a long time, and it's battery is still fine after almost 3 years.
ron12 said:
That could be the case. Yet, for two weeks, the Qi charging had no problems taking the charge to 100%. It would charge a bit over 15% an hour. The Galaxy Charging Current app reported between 670 and 750ma charging current using Qi charging.
At this point I'll likely never know, but it could be the battery itself simply failed on the tablet. My question is mainly to see if anyone else has used Qi charging, and what their experience is. How can I display the battery status (you referenced lv 2 (good) to ~ lv 4 (bad))? The battery app from the Play Store does display "battery health" but I've only seen it say "Good".
On your side note, I occasionally plug the tablet into the USB port on my computer (measures 5.10V), and it charges at about 10% an hour while sleeping, and has repeatedly charged the battery to 100% when I leave it connected. I have an EnrePlex Jumper Prime 4400mAh that measures 5.18V, and charges at 1.5A. It has charged the battery to 100%, though will run out of juice if the battery is lower than 40% before I use it, it measures 5.18V.
I have an old Galaxy Tab 2 10.1 that I often charge via the computer's USB port, although it takes a long time, and it's battery is still fine after almost 3 years.
Click to expand...
Click to collapse
The battery app from the play store probably does the same thing just shows a status as a replacement of the health, you can see the status with logcat occasionally you will see something like this ---
you might need root for some of these commands., you can use Terminal Emulator , adb shell, or sshd to access these commands.
Logcat::
1.
"D/BatteryService( 934): level:83, scale:100, status:3, health:2, present:true, voltage: 4091, temperature: 234, technology: Li-ion, AC powered:false, USB powered:false, Wireless powered:false, icon:17303447, invalid charger:0, online:1, current avg:-378, charge type:0, power sharing:false"
2. (shell)
dumpsys battery
will output something like this
Current Battery Service state:
AC powered: false
USB powered: false
Wireless powered: false
status: 3 < - unplugged
health: 2 <- health:2 would translate to good , health 1 would be excellent (though I have never seen a 1 status , 3 poor, 4 bad
present: true
level: 83
scale: 100
voltage: 4114
current now: -140
temperature: 248
technology: Li-ion
3. (shell, you can check out other files in the /sys/class/power_supply/battery/directory but be careful not to modify them)
cat /sys/class/power_supply/battery/health
Good
Please,anyone help me fixing my HTC One V. It was accidentally dropped in water,I turned off it immediately and removed the water as much as possible then I kept it in rice for 2 days.It is charging very slowly and it only turns on after plugging it to the charging socket.It takes 11-12 hours to charge to 60% and drains out in 3-4 minutes only. Please help me fix it.
hrushi2711 said:
Please,anyone help me fixing my HTC One V. It was accidentally dropped in water,I turned off it immediately and removed the water as much as possible then I kept it in rice for 2 days.It is charging very slowly and it only turns on after plugging it to the charging socket.It takes 11-12 hours to charge to 60% and drains out in 3-4 minutes only. Please help me fix it.
Click to expand...
Click to collapse
Looks like something is draining your battery or your battery is broken. Open the phone and look for damaged components...
jonas2790 said:
Looks like something is draining your battery or your battery is broken. Open the phone and look for damaged components...
Click to expand...
Click to collapse
Thanks for the suggestion,Can the battery change will do the work ? I have taken it to the Service Center they said that they will have to look it if it's charging socket problem,and if it is then being its socket mounted on motherboard directly they will have to change the motherboard of phone and it will cost me a fortune to do that.
hrushi2711 said:
Thanks for the suggestion,Can the battery change will do the work ? I have taken it to the Service Center they said that they will have to look it if it's charging socket problem,and if it is then being its socket mounted on motherboard directly they will have to change the motherboard of phone and it will cost me a fortune to do that.
Click to expand...
Click to collapse
I don't think the problem is the battery, it's more likely some short circuit with the charging port, yes.
There are some replacement part stores for hov, I just found a charging connector: http://www.parts4repair.com/htc-one-v-dock-port-charging-connector/
When you look at the pics of the connector it seems to be soldered onto the mainboard, but it shouldn't be that difficult...
But,the phone charges with the original connector,I think it's battery problem,Is there any alternate way to keep it charged? I'm gonna check it but I am unable to open one phillip screw as it's threads are damaged.How am I going to open the damaged screw?Please anyone help...
hrushi2711 said:
But,the phone charges with the original connector,I think it's battery problem,Is there any alternate way to keep it charged? I'm gonna check it but I am unable to open one phillip screw as it's threads are damaged.How am I going to open the damaged screw?Please anyone help...
Click to expand...
Click to collapse
I opened the screw and phone now the battery looks fine ,Is there any way to check the battery like with voltmeter?
hrushi2711 said:
I opened the screw and phone now the battery looks fine ,Is there any way to check the battery like with voltmeter?
Click to expand...
Click to collapse
If you already opened your phone, use hair dryer and lightly dry up your phone. Do the process for 3-4 times for about 2 minutes each.
You can check your battery with a multimeter, just follow below steps:
1.Switch off your cell phone and carefully remove the battery.
2.Now search on the label of the battery for its given voltage. Most batteries of cell phones are 3.7V
3.Place the battery such that its terminals face you.
4.Now keep the multimeter (either analog or digital) on DC Volt setting.It may be indicated with either DCV or just V and a straight line with 3 dots below it. In DCV (DC Voltage) also, there will be many settings like 2mV, 2V, 20V, 200V, 1000V. Keep the setting on the number above the actual voltage of the battery. It will be either 10V or 20V in most multimeters. An indication of ACV or just V followed by a curved line means AC voltage. Do not use this setting as batteries run on DC voltage.
5.Now touch the tip of the red probe of the multimeter on the terminal of the battery named ‘+’(positive) and touch the tip of the black probe on the terminal named ‘-‘(negative).
6.Keep both the probes touched until you see a stable reading on the screen of the meter. If the reading on the screen is more than 3.70 for a battery of 3.7V, then the battery is fully charged. And if it is less, then you will have to charge it with a charger. It should show a reading above the charge of the battery. If the battery is drained and showing 0 voltage or say less than 3.7, you will have to charge. If after charging for a long time, still it is showing the same charge, then the battery is faulty. You will need to buy a new one as batteries are not repairable. If the reading of the battery is below 3.7V even after charging it, your mobile phone will not switch on.
If you find this helpful, there's a thumbs up button (thanks button) just click it
hitman-xda said:
If you already opened your phone, use hair dryer and lightly dry up your phone. Do the process for 3-4 times for about 2 minutes each.
You can check your battery with a multimeter, just follow below steps:
1.Switch off your cell phone and carefully remove the battery.
2.Now search on the label of the battery for its given voltage. Most batteries of cell phones are 3.7V
3.Place the battery such that its terminals face you.
4.Now keep the multimeter (either analog or digital) on DC Volt setting.It may be indicated with either DCV or just V and a straight line with 3 dots below it. In DCV (DC Voltage) also, there will be many settings like 2mV, 2V, 20V, 200V, 1000V. Keep the setting on the number above the actual voltage of the battery. It will be either 10V or 20V in most multimeters. An indication of ACV or just V followed by a curved line means AC voltage. Do not use this setting as batteries run on DC voltage.
5.Now touch the tip of the red probe of the multimeter on the terminal of the battery named ‘+’(positive) and touch the tip of the black probe on the terminal named ‘-‘(negative).
6.Keep both the probes touched until you see a stable reading on the screen of the meter. If the reading on the screen is more than 3.70 for a battery of 3.7V, then the battery is fully charged. And if it is less, then you will have to charge it with a charger. It should show a reading above the charge of the battery. If the battery is drained and showing 0 voltage or say less than 3.7, you will have to charge. If after charging for a long time, still it is showing the same charge, then the battery is faulty. You will need to buy a new one as batteries are not repairable. If the reading of the battery is below 3.7V even after charging it, your mobile phone will not switch on.
If you find this helpful, there's a thumbs up button (thanks button) just click it
Click to expand...
Click to collapse
Thanks for the details buddy,actually when the phone is switched OFF and plugged to charger it charges and the LED indicator glows to green means fully charged and as soon as the phone is switched ON with the charger connected to it it charges again & again .Meanwhile the phone switches ON only when charger plugged on to the socket,It doesn't wake up on Normal battery condition.I am really frustrated with Non-removable battery type of this mobile.
Well,Thanks everyone for replying.The problem is solved after changing the battery.Big relief cause service center told me it will cost too much in changing the battery or changing the motherboard and I repaired it with very low cost watching youtube videos and a big help with XDA forum.
When I go to sleep at night, I usually leave my phone plugged in until I wake up. I need my phone to have a full battery when I awake, and this is the only option that I know of. I was wondering if there is a way to force the phone to charge a little more slowly so that it isn't sitting plugged in on the charger with a full battery for a few hours until I wake up, as I understand this can damage your battery and reduce longevity. Anyone have any suggestions?
Maybe you could use a low amperage charger?
With original charger (1.2A if I'm not wrong), it took nearly 6h for my phone to fully charge (while it was new and on factory software). Even the charger is declared as 1.2A, charging current never went over 700mA so you can safely leave it on charger, with no worries... Devices do have a overcharge protection, and simply will stop charging second battery sensor gives "Full" state (you can test that with Ampere - you'll get the charging current and see that even after 100% is reached, battery continues to charge for a while, until "Full" state is set by the sensor). Battery quality will deteriorate no matter what you do - they are made to survive some number of recharging cycles and that's it - mine suddenly started loosing capacity fast, after 2.5 years (or around 1000 cycles), out of blue, and you can just replace it. Same story with other phones I have/had: simply, after 2.5-3y their batteries start loosing capacity rapidly.
I would not recommend weaker charger (under 700mA) because our device has 250-400mA drain during idle, and if you want your phone to be full same moment you're awake, you may get a nasty surprise of "Charging" status Anything around 1A is more than enough.
Thanks so much! That answers my question.
Hi Guys,
I am planning to use my Nexus 5X for home use only (without SIM and rooted) and want to check if Battery is good or bad (for replacement).
I dont trust that much Battery apps on play store (I Dont know what theyre doing).
So some experts here who knows when battery is bad or not (maybe voltage or something) ?
Info:
I dont have any professional electric measurement stuff or anything like that
Nexus 5x is on newest Firmware (non rooted / custom)
Battery seems ok from outside - no expanding or anything else negative
Hope, somebody can help.
nobody ?
I agree with you that the battery capacity from an App probably isn't very reliable. What I do to really test the battery is the following. On Ebay I bought this USB tester which not only shows Voltage and Current but it can track the current over time, integrate it and show the total amount of mAhrs drawn.
First, your phone's battery needs to be empty. I just use the phone until it powers itself off. Obviously this goes faster if you keep the phone active. Then when the phone has shut itself down, charge it through the USB tester. There's a button on the tester to reset it to 0000 mAhrs. Then let the phone charge. Since the USB tester is USB and not USB-C you will have to use a USB charger (pick one that can deliver 2 A or more) and a standard USB to USB-C cable. Charging may take a couple of hours. When the current on the tester shows a low value the phone is charged and you can read the capacity that was charged.
It is possible that the actual capacity of the battery is slightly larger than the value measured by the USB tester. That will be the case if the phone's charging circuit uses a switching charging regulator because then it will be able to convert the 5 V charging voltage to the 4.2 V battery voltage almost without losses and that would mean a slightly higher current at the battery. I am unsure if the Nexus 5X has such a switching charging regulator, probably it does as it would get quite hot if it didn't especially while it is fast charging.
The Nexus 5 devices I have access to measure at around 2100 mAh. If your value is close to that then the battery isn't worn out more than average.
Yep you right, didnt think about to "monitor" electrical charge from USB directly... Thanks
I know reading electrical charge out from USB dont show the exact amount of power... I mean you have power loss from the USB resistors (I think)
A friend of mine told me also: I have to test more then one "USB testers" - reason: some (not all) passthrough the quick charge signal properly -> phone charging fall back to USB charge on 500mv -> more tollerance from USB tester (If I dont misunderstood)
The USB method will always have some error. But "some (not all) passthrough the quick charge signal properly" isn't relevant, if that is the case then the phone will simply charge slower. Also the Nexus 5 can only use 5V as the USB voltage, it doesn't support 9 V or 12 V Quickcharging at all.
How accurate the USB method is depends on how the phone is designed and how you charge it. When the phone is active (switched on) it will consume some power which is added to the measurement. So I switch my phone off when testing it. Then always some energy is lost in the charging circuit. It depends on how it is implemented.
To really accurately measure the battery capacity you'd have to disconnect it from the phone and connect it to a charger (or discharger) that can measure battery capacity. But then there's the issue of what voltages to use as "empty" and "full" voltage. If you'd charge the battery to 4.3 V you get a bit more capacity but it stresses the battery more resulting in a shorter lifetime. That's why 4.1 V or 4.2 V are more commonly used as the "full" voltage. It is similar with the "empty" voltage, lower gives more capacity at the cost of stress on the battery.
All in all, battery capacity can only be measured accurately under strict and well defined conditions. But for a rough indication the USB method works well.
OK understand.
Is there any percentage, voltage or other value on liion batterys to identy it as "dead" ? I mean a "common" value to identy dead liion batterys or do they differ ?