Hello,
I have a HTC Blueangel with a somewhat novel approach to charging its battery.
When connected to the USB, the charge meter continuously _decreases_, something close to 1% in 5-6 seconds. When the meter reaches 0%, it stays there for a short while (20-30 seconds), then jumps back to whatever the real charge is. And start decreasing again. After the regular several hours, the battery gets fully charged as normally should.
The charging used to work normally a while ago, and I cannot figure out what (or when) did I do to make it act this way. Initially I thought it might be a software problem, tried a hard reset, but it's still happening.
It's running WM2003 (1.42), with radio 1.15. BlueTooth, IR and wifi are disabled, screen brightness is set to min, etc. so I cannot understand what is going on.
Normally it should not be much of a deal, because the battery really has charge in it. But the system believes the indicated meter, so when going really low on the battery meter, it decides to disable stuff like phone, SD slot, etc. trying to conserve an apparent lack of charge.
If I disconnect the USB cable, the charge meter appears to drain at the normal rate (regardless of what the _real_ charge is). All other battery-conserving features appear to function normally -- notifications at 20 and 10%, shutting down when empty, etc.
I do not have a wall charger, so I could only test USB charging. I do not have another BA available to test just the battery.
Any ideas as to what might be going on? Is it possible to fix it?
Thanks,
-Daniel
lol sounds annoying........what about reinstalling wm2003???
i am having a similar problem - using the usb charger while in the car seems to discharge the battery. nothing seems to fix battery drain problem - but on the cradle it is fine. let me know if you find anything on this one
My Galaxy Tab Pro 8.4 is on a stand on my desk most of the time. I usually leave it hooked up to AC power while on the stand. What's better for the battery: to leave it plugged in, so the battery remains at 100%, and only disconnect it from AC if I'm carrying the tablet around, or to not connect to AC while on my desk and let the battery drain slowly and recharge it, so actually go through drain-and-charge cycles? I've googled this, but I'm finding conflicting information. Are there definitive recommendations in this area?
Thanks!
--Ron
With mine I only charge it if the battery is 50% or lower, Leaving it plugged in with AC connected should be ok, I have a amper cable that shows power draw and when the Battery is fully charged the tablet pretty much draws 0mA with the screen off, and an occasional 20mA probably because of wake-locks or possibly trickle (unsure).
With that being said if the battery does fall below a certain voltage with it plugged it it might switch the charger back on to top the battery off and these micro charges can possibly wear the battery out though I'm not sure if it does this or if it trickles the battery (maybe ill monitor the logcat to see what the battery does when its plugged in)..
anyways key rules to lithium-ion battery's is never completely drain them, don't constantly charge them wait till 50% or less, avoid getting them too hot.
Did anybody get issues months after they'd purchased the device?
My 8.4 Pro worked perfectly (6-8h SoT, 100% charge everytime) for about 2 months, but hasn't been charging properly since yesterday. I tried combos of all my charger/cables - they are all giving 1A+ rate on my other devices, but not even being measured on the tab (vis Ampere). Battery has been stuck around 50% for ages. I'm in India, so no easy way to get this back to the US for warranty replacement. Besides, by the time I return to NJ, the tab will be out of warranty.
Please note that I have also factory reset it. The problem, unfortunately, persists.
What should I do? This may not be a software issue: I use this tab while I'm on a stationary cycle, so maybe that motion somehow 'knocked' the battery out of whack somehow? Should I open up the tab and do a battery reset? Is there any, less dangerous, solution?
SoberDogs said:
Did anybody get issues months after they'd purchased the device?
My 8.4 Pro worked perfectly (6-8h SoT, 100% charge everytime) for about 2 months, but hasn't been charging properly since yesterday. I tried combos of all my charger/cables - they are all giving 1A+ rate on my other devices, but not even being measured on the tab (vis Ampere). Battery has been stuck around 50% for ages. I'm in India, so no easy way to get this back to the US for warranty replacement. Besides, by the time I return to NJ, the tab will be out of warranty.
Please note that I have also factory reset it. The problem, unfortunately, persists.
What should I do? This may not be a software issue: I use this tab while I'm on a stationary cycle, so maybe that motion somehow 'knocked' the battery out of whack somehow? Should I open up the tab and do a battery reset? Is there any, less dangerous, solution?
Click to expand...
Click to collapse
You need to use a 2A rated charger and really there is only a few that qualify, I suggest you only use the Samsung charger as they seem to have a certain way to charge it, chargers do go bad sometimes so look for an official replacement (they cost like $5 on ebay), beware of knockoffs though since they look identical, I suggest searching for the same model number on the charger. IE : EP-TA10JWE
anyways here are some things to try in the meantime
1. drain the battery down to 15%
2. hold the power button down and choose the Power Off setting, wait until you feel it vibrate, now let the tablet sit for an hour in this state. (do not hook it to a charger)
3. after an hour or two, plug the charging cable into the table and let it charge (do not turn it on), you should see an animated battery screen show up a few times, see if it reaches 100% in this "powered off" state.
if it does then that could mean there is an app running in the BG when it is started causing a lot of cpu load or keeping it awake..
I've so far had my tab 8.4 for almost a year and the battery is still holding up with 8-10h of runtime (depending on what I do). and it always charges to 100% using the samsung charger.
otyg said:
You need to use a 2A rated charger and really there is only a few that qualify, I suggest you only use the Samsung charger as they seem to have a certain way to charge it, chargers do go bad sometimes so look for an official replacement (they cost like $5 on ebay), beware of knockoffs though since they look identical, I suggest searching for the same model number on the charger. IE : EP-TA10JWE
Click to expand...
Click to collapse
The chargers I tested were rated 2A, and their cables were 28/24 AWG. On my Dell Tablet, the same setup was giving me around 1300 mah. On the pro, most of the time the current didn't even get measured.
Tried the other things you mentioned. It charges, overnight, to 100%, but despite the factory reset, weird battery behaviour is observed: slow recharge, jumping from 93% to 100% the moment i connected it to the lappy to transfer data, etc.
SoberDogs said:
The chargers I tested were rated 2A, and their cables were 28/24 AWG. On my Dell Tablet, the same setup was giving me around 1300 mah. On the pro, most of the time the current didn't even get measured.
Tried the other things you mentioned. It charges, overnight, to 100%, but despite the factory reset, weird battery behaviour is observed: slow recharge, jumping from 93% to 100% the moment i connected it to the lappy to transfer data, etc.
Click to expand...
Click to collapse
You are using the Samsung charger?, I noticed with other chargers for some reason when the battery gets near full the mA drops to under 200mA and stops charging the battery or its just enough to keep the tablet running, this does not happen with the Samsung charger it mostly charges the tablet at 1880~mA, when its in the 90% range drops to about 600-800mA so it can still trickle charge the batt and provide enough power to keep it running.
I have tried other chargers like the 2A HP Touchpad Charger (was supposed to be the best charger out) and some 2A powerbanks - and they all fall short near 90%, just don't pull enough amps, I think the samsung charger has a higher voltage too 5.60v where the others are around 5.30v
btw I have an actual hardware mA cable that shows the current in realtime, I'm not sure how accurate the battery monitor programs are for android without root access, since without root I don't know how they read the system files.
otyg said:
You are using the Samsung charger?, I noticed with other chargers for some reason when the battery gets near full the mA drops to under 200mA and stops charging the battery or its just enough to keep the tablet running, this does not happen with the Samsung charger it mostly charges the tablet at 1880~mA, when its in the 90% range drops to about 600-800mA so it can still trickle charge the batt and provide enough power to keep it running.
I have tried other chargers like the 2A HP Touchpad Charger (was supposed to be the best charger out) and some 2A powerbanks - and they all fall short near 90%, just don't pull enough amps, I think the samsung charger has a higher voltage too 5.60v where the others are around 5.30v
btw I have an actual hardware mA cable that shows the current in realtime, I'm not sure how accurate the battery monitor programs are for android without root access, since without root I don't know how they read the system files.
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Click to collapse
Getting a slow current with the 5.3v samsung charger and cable as well. But yeah, using software (GSM battery, Ampere) to get the charge.
SoberDogs said:
Getting a slow current with the 5.3v samsung charger and cable as well. But yeah, using software (GSM battery, Ampere) to get the charge.
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Click to collapse
Hm I suppose the battery could of went bad if it wasn't being charged properly by some chargers for example if it was never reaching 100% then the system never shuts off the charging mechanism and will essentially cook the battery causing it to die faster then normal .
If you had root access you could check the status of the battery and it would report the battery info in stages - very good (brand new), good, bad, fail ..etc I am not sure if non root programs can access this info.
I guess there are a few extra things to try.
1. A new Samsung charger, it might be possible yours went bad.
2. re-seat the battery, though this requires opening the tablet possibly voiding the warranty or causing other damage - maybe take it to a repair shop if you have difficulties, from what I have read on this forum it has solved numerous cases like yours, not sure exactly what it does perhaps removing voltage from the hardware causes and glitches to reset like from accidental static electricity shocks or if it just re-calibrates the battery like it was replaced..etc, it might just be the connector comes loose, anyways it sucks Samsung didn't included a reset button since it's a needed feature for sealed tablets)
SoberDogs said:
Tried the other things you mentioned. It charges, overnight, to 100%, but despite the factory reset, weird battery behaviour is observed: slow recharge, jumping from 93% to 100% the moment i connected it to the lappy to transfer data, etc.
Click to expand...
Click to collapse
This is a fairly common issue on this device. Its a defect, I'm thinking its the "smart battery" circuitry on the battery itself (my understanding, at least some of the metering is done on the battery by this circuitry). Its been discussed at length on the following thread; with the suggested fix being to open up the tablet and "reseat" the battery: http://forum.xda-developers.com/galaxy-tab-pro-12-10-8/general/reseating-battery-wonder-battery-life-t2944610
I've had this problem for a while now. The issue was non-existent or rare at first, then got more common after owning the device for a few months. Haven't used any apps to measure the mA, but this is across 3 or 4 different chargers, 2 of which are original Samsung 2A chargers (had another one left from my broken Note 8). The issue also persists whether on stock ROM, custom TouchWiz ROM, or custom AOSP ROMs.
Sometimes the tablet will charge fully, no issue. Sometimes it will stop somewhere along the way (well short of 100%) and doing a reboot will usually get the charging "going" again. Sometimes I will need to reboot 3 or 4 times to get it charged to 100%. I've also tried factory resets, but its hard to say whether this helps or not.
Short of rebooting while charging, there isn't much I've found to help. I haven't tried opening the device to reseat the battery.
Maybe the usb port in the tablet has some debri in it. Try blowing it out with some cpompressed air. The symtoms sound like a faulty usb cable but if you have tried different ones it might be the port.
Sent from my SM-T320
My Galaxy Tab S SM-T705 was working fantastic, untill one day, the battery dropped to zero. Then it got stuck. Wouldn't charge. Wouldn't turn on. I tried multiple things charging overnight with the original charger. Then I tried charging overnight with a heavier charger (note 4 power charger). That was until I read a guide on tech republic about how I needed to do a battery pull to negate minor trickle charge from the battery. Anyhow, I ripped the back cover off and took it off, and voila it started working.
However, I began experiencing crazy battery drain. I suspected that something was wrong with the battery; that I had damaged it with the overnight charging and stuff.
To remedy this, I ordered two spare batteries off of AliExpress. Hoping that I'd get this fixed by replacing the battery. This was until something happened that made me suspect that the problem is not with the battery
Today; I powered it off to replace the sim. And let it turned off for 6 hours or so. And while completely turned off, it drained 50-60% battery. This means that there are two possibilities.
Either the battery is ****ed and is draining battery ( i can test this by charging it up fully and then disconnecting it from the motherboard and then connecting it again after a day - if its drained while not being connected to the motherboard, then its the battery that's at fault)
If however, the battery only displays drain while being connected to the Tablet/Motherboard, then there's something wrong with the tablet (and its likely in this case that I can't do anything to fix this.
In scenario two, though, I was wondering, is it possible that it has something to do with the connectors on the back cover? There are these antenna that you can see in this picture: http://dl-1.va.us.xda-developers.co....jpg?key=YuQ4sx_xJyTckKe2XxlcWQ&ts=1436984729
I suspect that the power drain may have something to do with the antenna's on the back cover. Anyone know what those antennas are for? They say stuff like LTE and WiFi however, I've taken off the back cover and its still connecting to mobile data and wifi etc. So these may be extra antenna's etc.
network, wifi and bluetooth and gps need access to an antenna, have you tried turning on airplane mode to see how much power your tablet uses then.
Install GSam Battery Monitor, It calculate your battery drain in mah, also it will show if your tablet is going into deep sleep, and it can list the apps that use the most power in the App sucker.
https://play.google.com/store/apps/details?id=com.gsamlabs.bbm&hl=en_GB
The app below will allow you to see how many percentage points your tablet uses, for example overnight.
https://play.google.com/store/apps/details?id=com.ck.batterymonitor&hl=en
John.
The circled chip keeps on heating, even when I turn it off. I suspect this might have something to do with my battery draining... can anyone help?
I disconnected the battery from the motherboard, and it didnt draining. But draining when connected.
Imgur.com/3NLqmh5
Im Having exactly the same problem, and I say its not software, its the hardware! suspect in the power IC that manages the energy for tablet is problematic, check if your tablet while idle/turned off is heating on the bottom back. This excessive heating is the response of a malfunctional component.
I think the only way to solve this is sending to samsung specialized support to change the defective IC.
POst if your problem solves, I didn't solved mine yet.
Hi,
I'll have rooted Galaxy tab 3 8.0 and since it's old it has been mostly only on light use with org rom for couple of years now. Org battery was going down, sudden shutdowns on heavy use and didn't have a juice anymore so I decided to order new battery. While I was waithing new battery to arrive I didn't use that tab and I forgot it to a freezing work car with power on so that tab/old battery froze and tab shutdown. Problem is that it won't charge or start anymore with new or with old battery. Not with any button combination or not with any cord or charger or pc, not with cold battery or not with warm battery. I also used multimeter to check that there is enough voltage in new batt to start. It just doesn't do anything. No light, no charging icon on screen, nothing. So is that galaxy tab just froze to death(was max - 10'c) or is there any other ways to try to recalibrate/reset power circuit on tab so it starts to understand again when there's battery or charging cable on? Now it's just stupid thing that doesn't seem to understant that there's battery inside and power cord plugged in.
What if it's not only the battery that got damaged? I bet there's more, that's why new battery does not help.