Less than 4 hour battery life - Samsung Epic 4G Touch

I just got less than 4 hours of battery life. Is this normal even under intensive use?
For the first 1/4 of the time, I had the phone in my pocket. For the second 1/4, I was playing Symphony of Eternity, a simple 2D RPG that looks like an SNES game, and a bit of Greedy Spiders, another simple 2D game. By the time I was done (a little past half way through the graph) I was already at half charge.
I then disabled wifi and turned off my phone and put it back in my pocket. The battery use decreased, but only by a little. At the end of the graph, I got alarmed by how fast the battery was draining and rebooted my phone, and when I restarted, there was the abrupt jump down in battery.
Anything jump out as a red flag here? I took a look at the Android OS bug thread, and it sounds like that is what I ran into, but does this seem like short battery life even for the Android OS bug and the amount I used it?
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Related

[Q] Bad battery

Hi,
I've been using HTC Desire for 6 months and I got this problem lately.
First, please have a look at the battery icon. What does it mean?
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Second, during the day use, my phone just freeze for no reason. And when it's freeze, the screen is totally off and the notification light flash 1 green, 2 orange continuously. Then I have to take out the battery, plug it in and turn it on to use. It just happens so randomly.
Third, it happened just now. I played game till the battery gone and left it on the table and went to sleep. But when I woke up, plugin the USB charger (I forgot the main charge at work) and it didnt charge. I turned the phone on and saw the battery icon was like what appears on the screenshot above. I turn it off and on again, the battery became full magically
So what caused all those is the battery? And sometimes when I use the phone for a long time when the battery get hot, it's freeze like I described as well.
Anyone got in the same case as mine?
No one knows?

My GNex charge itself???

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Guys,not to waste our forum resources but did you see something like picture above ? It went from 9% to 11% ,without a charging cable and with 4G on bt on GPS on ...
It is simply because the OS is still getting used to the battery ? US Verizon version ,ics 4.0.4 stock rom
Sent from my Galaxy Nexus using Tapatalk
From what I have read there appears to be some sort of auto calibration going on while the phone is on. It is giving you an estimate of the battery life and then realizing there is actually more than the original estimate so it's re adjusting the display of battery life.
My guess is it's similar to how if you are driving uphill (or downhill in some cases) your gas tank in your car may display an incorrect reading of the gas but once it levels out it reads correctly.
I could be entirely wrong but that is what I have pieced together from what i've read.
The reason is quite simply ... chemistry.
The battery voltage recovers (= goes up) a little bit after the battery was under (heavy) load. Thus the battery percentage displayed can go up a little bit, too.
TL;DR: It's magic!
Yes, the Galaxy Nexus has a great undocumented feature. If you leave it in a room on it's own for long enough it will eventually get up and plug itself in for a while, if it hears you coming back though then it rushes back into position and plays dead again.

Slow charging and heating

Despite this phone being just perfect in every other way, a couple of things​ about it is just frustrating the heck out of me. I don't know if it's just my device or if this is a normal thing, but my Pixel XL charges SUPER slowly. Taking about as long as an iPhone to reach 100% on low percentage and 40 minutes to an hour with 50% and above. My 6p charges faster than this using the same charger. Not only that, but my phone gets really warm when charging and slightly warm with general use. Does anyone else experience this?
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Sent from my Pixel XL using Tapatalk
I experienced just yesterday. Normally the phone charges about 1% every minute for me, but yesterday it was 1% every two minutes or something, got really annoyed, turned off the phone, charged normally! And yes, there was a little bit of heat too, nothing complaining worthy but it was there, but then again I use a full back case, which I will remove shortly. The phone/SoC has some thermal throttling surely, cause several times I noticed the phone's performance would drop down severely while charging.

Problem with Kernel/Proximity Sensor causes Battery Drain

Hi,
I have a problem with my G5S recently. I had already sent it to a service center because of this, but Moto's Partner for repairs in Germany is horribly incompetent, so it came back with the same issues still occuring.
I think the whole thing began with a restart by holding power for 10 seconds some weeks ago. Later that day I noticed the infrared sensor on the phone's back to glow permanently red, much brighter than normal. It is the one left to the camera. This is even the case if I power down the phone, only with 0 battery the sensor goes off until I recharge.
With this sensor bug comes a massive battery drain, the phone never seems to go into deep sleep mode, the battery stats in the settings show a ongoing bar under active time. I made some screenshots of GSam Battery Monitor, maybe someone can tell me how to stop the process which holds the device active. The phone has no root or any modification by the way.
Thanks!
Screenshots:
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Question AccuBattery reports merely <2000mah capacity

Hi, i recently got a new GT master, everything is good except one thing. AccuBattery reports the phone's battery capacity is only 1928mah (screeshot attached). The battery feels ok though - lasts more than one day with normal usage (hours of gaming, navigation). Navigation consumes about 10% per hour. Should I be worried?
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Found a possible reason: this phone splits the battery into two parts and AccuBattery might only have detected one of those.
It could be.
I know this phone have one of the longest batterie of all phones I ever had, easy 1,5 day with 15 social apps running
pigjr said:
Found a possible reason: this phone splits the battery into two parts and AccuBattery might only have detected one of those.
Click to expand...
Click to collapse
Exactly this. Phone has two batteries to support the 65W charging.

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