Develop Bugs

[Q] Sudden Dead at 65% battery, anyone can help please?

Hi All,
I have experienced something wrong with my HTC one x (upgraded OTA). It is off automaticly when reached around 40-60% battery. it happens randomly but mostly around it.
when i turn on again, it is just start till the unlock screen and it suddenly OFF again.
I have to plug the charger first and start again to make it live.
when i checked the battery while charging from the sudden death. it is charging from 35% power which it means there is still a lot of power.
when it is charged full to 100% it is automatictly off again when reach around 40-60%. In these case it off at 65%, please take a look at my battery log at the attachment.
Does anyone experience the sama thing, please help me to figure these out.
thank you so much for the attention.
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kn33cow said:
Hi All,
I have experienced something wrong with my HTC one x (upgraded OTA). It is off automaticly when reached around 40-60% battery. it happens randomly but mostly around it.
when i turn on again, it is just start till the unlock screen and it suddenly OFF again.
I have to plug the charger first and start again to make it live.
when i checked the battery while charging from the sudden death. it is charging from 35% power which it means there is still a lot of power.
when it is charged full to 100% it is automatictly off again when reach around 40-60%. In these case it off at 65%, please take a look at my battery log at the attachment.
Does anyone experience the sama thing, please help me to figure these out.
thank you so much for the attention.
Click to expand...
Click to collapse
Uhm I'd suggest you try a battery recalibration, it might be some issue with the software! Try letting your battery drop to 0 % (I really mean that the phone falls out because of zero power, then reboot it untill it no longer reacts), then the phone is completely empty.
Then recharge it again to 100 % (let it charge for about 8 hours).
But to make sure you bettery just google "battery calibration" for a good guide on it!

H-Cim said:
Uhm I'd suggest you try a battery recalibration, it might be some issue with the software! Try letting your battery drop to 0 % (I really mean that the phone falls out because of zero power, then reboot it untill it no longer reacts), then the phone is completely empty.
Then recharge it again to 100 % (let it charge for about 8 hours).
But to make sure you bettery just google "battery calibration" for a good guide on it!
Click to expand...
Click to collapse
thank you so much for the tips, right now i will try to make it really empty and charge. one question when it is already full should i unplugged the charger first and then calibrate or i just calibrate with the charger plugged on?

it is still happen and my phone shuts down by itself randomly around 40-60%.
is there any other solution i can do to get rid these battery case anyone?

Have you tried clearing Battery stats in recovery, then let it drain till the phone shuts down, then charge till full while the phone is still off... The LED will turn green once it's full...
If still same problem, charge till full again, turn on Airplane mode and run the battery test, on your dialer key in *#*#3424#*#*, click "Accept" then on bottom right tap on "More", select Battery test and click run

my battery pass the test but the status of it still error. it will shut down by itself when comes to 40-60% randomly. TT i have never experienced my phone low battery or red. it dead already around 40-60 so i should charge it.

I posted that then I saw your thread:
http://forum.xda-developers.com/showthread.php?t=1706811

Zenwatch wont charge - Black screen

So I've had my zenwatch for about a week now and lastnight it was working perfectly fine but this morning I woke up and my screen was black. I placed it on the charging cradle (which normally triggers the screen to turn on) this time nothing happens, the white charging indicator light on the cradle lights up but the screen does not cut on. I've tried holding down the power button, cleaning off the charging prongs, even using the usb of a pc for trickle charging but nothing seems to wake the screen up. Has anyone else ran into a similar problem? Know of a possible solution?
Thanks
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If the battery is totally flat it can take a while to show signs of life. Leave it on charge for half an hour and see what happens.

Left it on the chargwr for 8 hrs last night. Still no sign of life. Its so weird i have only had the watch for 1 week and its in perfrct condition. It just wont cut on.

Did you get an answer to this as I'm now in same position

Same thing has now happened to me!

Maybe they have a self destruct ready for Zenwatch 2 release! Will have to get my Moto out of hibernation when I get back home....

I am not sure but I think your watch is dead. One of my friends was using the Zenwatch and he has faced the same kind of problem. He couldn't get back his watch. You can contact with customer service.

Bug bug bug
Same problem happen to me... after 2 month of usage (updated to 5.1.1)
Accidentally my watch wont charge anymore until the battery running out
If I put my watch on charging craddle with original travel charger, the white led indicator of craddle turn on but my watch still won't charging and the screen just black... no vibration, no display, no sign of life... try to press power button as long as I can.. doesn't help...
Is this hardware defects or just software problem?
Anyone has solution or fix for this?
It is so weird..

Same issue. didn't charge it for a week and now wont show any signs of life even after leaving it on the charger for days. also tried holding the reset button for minutes.

Hi,
just recently I had the case with ZenWatch from Asus, which was shelved for one year. After connecting to charger screen stayed black and watch was vibrating (short vibration every two seconds).
This is typical fault of COMPLETELY discharged battery. Had such cases with telephones before. By experiment I found the way long time ago. You have to "initiate" or "ignite" battery. In case of telephone batteries take out battery, use old USB cable, clean wires from insulation from one end (opposite to male plug). Use black (-) and red (+) wires as 5 V supply. Identify + an - on battery. Prepare your phone, watch charger for charging. Touch end of + wire to + contact on battery/watch and - to - accordingly for about 20 - 30 seconds. After that quickly put battery to phone or watch to charger and normal charging will start. Be careful not to make any short circuit with wires or wrong terminals.
I made it many times and always successful. In case of Asus Zenwatch proper contacts are these corresponding to first two pins of charging cradle from the side of USB connection - outer one is ground (-) next one is +.
Good luck!

Happened to me recently after washing my watch. Turned out there was a little bit of water inside and after drying it, it powered up and started to charge properly again

I've recently had the same problem. When I connect the charger, the watch vibrates once then does nothing. Screen stays black no matter what I do, and I've left it charging for days now

Note 8.0 only runs when plugged in - battery 100%

My Note 8 only receives power when plugged in. I have replaced the power port but problem persists. Battery shows 100% but when I remove the power cord it dies. Any help would be appreciated.

Could be bad battery or needs a power reset, open the backside cover and unplug the battery connector and wait 2 minutes, and reconnect.

I did this while installing the new power port. I have ordered a new battery. I'.lol report back with the results. Thanks for your input
fwiw I got this off eBay for $15 so I have some monetary leeway as far as repairs go.

Zweiguys said:
My Note 8 only receives power when plugged in. I have replaced the power port but problem persists. Battery shows 100% but when I remove the power cord it dies. Any help would be appreciated.
Click to expand...
Click to collapse
Your tablet only runs when plugged in even when battery is full, possibly the battery connector has some open pins. Re solder the black battery connector may fix it.
Open pins can fool your tablet the battery capacity. For example, disconnect battery cable from battery connector, plugged in and press the HOME button, it will show the green battery icon is charging, then within 30 seconds, it will show the 100% battery icon. When sensor from the mainboard doesn't see any drawing charging current , it will send the signal to charging circuit the battery is full and it should disconnect. This behavior you can test on any Samsung tablet to see if charging port is drawing current to battery connector or it's working.
Any repair shop or anyone knows how to solder can help you, this re solder only takes under 5 minutes and you only need to disconnect battery cable.
Here what it looks like when I fool my tablet by disconnected the battery while charging:
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Best, thanks for that info. I'll do,that test when I open the tablet to install the new battery.

Zweiguys said:
Best, thanks for that info. I'll do,that test when I open the tablet to install the new battery.
Click to expand...
Click to collapse
This can be bad battery or open, cracked battery connector. When change new battery, don't put back the rear cover, test if your charging port is working without battery. Then connect the battery, press the HOME button to see the flashing green battery icon. If it's OK, waiting for at least one hour, press the power button to turn on. If it's turn on, you have a bad battery.
If it doesn't turn on with new battery, then the battery connector is the source of problem and need to be re soldered.
This is the battery connector you should look for, I already re soldered this black connector by adding more solders to 6 joints:

Beut, installed new battery today with no change. I did as you suggested and the device did register 100% battery even though one was not present. The area around the battery connector appears to either have corrosion (slight) or maybe a power surge. Just doesn't look right.
I only paid $15 for this and the fact that it runs fine while plugged in I'll probably take it to work and use it to watch the EPL games on Saturdays. Maybe at some point I'll come across a working unit with a bad screen.
Thanks again for your help. Keith

Zweiguys said:
Beut, installed new battery today with no change. I did as you suggested and the device did register 100% battery even though one was not present. The area around the battery connector appears to either have corrosion (slight) or maybe a power surge. Just doesn't look right.
I only paid $15 for this and the fact that it runs fine while plugged in I'll probably take it to work and use it to watch the EPL games on Saturdays. Maybe at some point I'll come across a working unit with a bad screen.
Thanks again for your help. Keith
Click to expand...
Click to collapse
I think you should re solder this battery connector, it takes only few minutes for who knows how to solder.
Any repair shop can assist you with little charge as it's only a 5 minutes work.
Cracked battery connector is very common in Samsung tablets, not just this tablet.

Maybe I'll give that a shot at some point. I guess I can't make it any worse. The connector looks a little odd near the two red wires coming from the battery.

Crash at 80% battery

Hi my tablet is crashing every time the battery is lower than 80% (it turns off immediately) end keeps crashing every time i restart it and begin using it after 2 or 3 seconds and the battery drains every restart .Is it surely a battery problem or it could be caused by anything else?

lomlom10 said:
Hi my tablet is crashing every time the battery is lower than 80% (it turns off immediately) end keeps crashing every time i restart it and begin using it after 2 or 3 seconds and the battery drains every restart .Is it surely a battery problem or it could be caused by anything else?
Click to expand...
Click to collapse
Probably you have a cracked battery connector, common problem of Samsung tablet. Re solder will fix this problem, you can verify by removing the back cover, apply directly pressure on the black battery connector and turn your tablet on; if it works, problem solved, just find someone or a repair shop to help you to re solder the battery connector.
Don't forget to fix the white battery connector too, it's also the source of problem
http://forum.xda-developers.com/gal...-flicker-screen-freezes-random-t3165471/page2

Beut said:
Probably you have a cracked battery connector, common problem of Samsung tablet. Re solder will fix this problem, you can verify by removing the back cover, apply directly pressure on the black battery connector and turn your tablet on; if it works, problem solved, just find someone or a repair shop to help you to re solder the battery connector.
Don't forget to fix the white battery connector too, it's also the source of problem
http://forum.xda-developers.com/gal...-flicker-screen-freezes-random-t3165471/page2
Click to expand...
Click to collapse
thank you for the reply I unplugged the black connector and re-plugged it and the problem seems to be fixed but i didn't find the white battery connector

lomlom10 said:
thank you for the reply I unplugged the black connector and re-plugged it and the problem seems to be fixed but i didn't find the white battery connector
Click to expand...
Click to collapse
Unplugged and re-plugged battery helps to solve problem, then you may need to do this little fix of the white battery connector. I had one battery which didn't take charge, after this simple fix , it works normal again.
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You need a thin knife and magnified glass to do this fix, push the opening as close as possible.
https://www.youtube.com/watch?v=PU0OoZSbma8&feature=youtu.be

SM-T520 10.1 Tab Pro Battery dead when turned off

Hello,
I have several Tab Pro's that are all having the same problem. I have charged the devices to 100% then when it sits for a few days it will not turn back on. I have plugged it back in and it show 0%.
This is what i have done to try and find the issue...
1. I have reset all cables
2.Tried different batteries (USED)
3.Re-Rom with ODIN and Factory reset
4.Checked the pins on battery terminal for bad solder contacts
5.Waiting on new batteries
Now the interesting part. I charged 2 devices to 100% then disconnected the battery from the Logic board so I could check to see if the battery is discharging on its own. After 3 days I reconnected the battery terminal and tried to turn it back on. They will not power on, then I plug in the charger and battery icon shows up with 100% and then I'm able to turn it back on. Any ideas what the issues with these are I have about 8 of them all doing the same thing?
Thank you,

The battery doesn't discharge on its own so fast like your description. I have a Tab Pro 12.2 , which is off almost 3 months, when turns on it still keep the charge at 99%
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The problem is from the cracked battery connector, it will cause intermittent connection. Trust me, remove the back cover, use your hand to press directly on the battery connector while turning it on, it might work depending how bad the crack is. All you need is resolder the battery connector.

Beut said:
The battery doesn't discharge on its own so fast like your description. I have a Tab Pro 12.2 , which is off almost 3 months, when turns on it still keep the charge at 99%
The problem is from the cracked battery connector, it will cause intermittent connection. Trust me, remove the back cover, use your hand to press directly on the battery connector while turning it on, it might work depending how bad the crack is. All you need is resolder the battery connector.
Click to expand...
Click to collapse
I have tried to resolder a few of them and they still do not turn on or they discharge the battery. I have a few that I charged the batteries up to 100% and disconnected them from the battery terminal on the logic board over the weekend. They all still do not turn on, then I connect the charger and the battery icon shows up with 100% then I can turn it on. I have tried what you said and pushed on the terminals on all of the ones I have and not one will turn on. I'm starting to think there is a issue with the power management chip on the board. Has anyone tried to replace any of these?
I have had issues with SM-t/p900 12.2 pros that had the issues you are talking about, not charging, flickering screen, and the terminals needed to be resoldered. I could actually push the pins up and down. The SM-t520 pins are solid and do not move.