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[Q] I need help with my tablet draining battery too quickly

Hi, I'm having a serious issue here. I unplugged my Transformer from my charger about about 11am today. I have used it, according to the screen on time in the settings, for 34 minutes. (it's now about twelve hours later.) However, the battery life is at 64%. I just don't understand this. My wi-fi is set to disconnect when screen turns off, and brightness is at about 55-60%. But look at this.
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Does anybody have a clue what could be going on? If you need more information about what state it is in, I'll be glad to provide more details. It seems like this started after I updated to 3.2, but that could be unrelated.

After updating did you set up the wifi power saving again? There is a bug in android where this setting gets reset when the device is rebooted

AustinMartin said:
After updating did you set up the wifi power saving again? There is a bug in android where this setting gets reset when the device is rebooted
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Yeah, I double checked when I posted this and it was still on "when screen turns off".

Try using juice defender. And check your running services/applications/auto sync cuz i see there alot of wifi actifity and your device is awaken even though the screen is off.

You could try using an app called Sysem Panel by NextApp.
You will need the paid version so that you can turn on the Monitoring option in the settings - this allows you to monitor the CPU usage over 2h/8h/1d/3d.
You can also monitor Top App usage of CPU which is fantastic for identifying the culprit.

Battery use Idle -> tips?

Hello guys,
Have a small question about battery use when phone is idle, e.g. at night. I loose 1%/hour with 3G/WiFi disabled, sync disabled, and 2%/hour with 3G/WiFi enabled, sync disabled. So no sync, no apps updating or refreshing. When I sleep for 9 hours I lose 18% with 3G on, which seems quite much to me. This also used to be only 4-5% with 3G on. While using the phone my battery is fine actually, I lose 2-3% an hour idle with sync enabled (whatsapp, push gmail, hourly weather, tweetdeck every 6 hours). The battery seems to be a bit worse then before 2.3.4, but I'm not quite sure about that.
So I downloaded BetterBatteryStats to see what might keep my phone awake at night (see pics). The slow decline is at night, no sync. As you can see there is one blue block in which the phone is awake but the screen is turned off. However, this wakelock is not present in the BetterBatteryStats output afaik. Anybody has any thoughts on reducing battery use when idle? Cause I see alot of people who lose like 1-2%, I would like to have that as well!
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Translation:
Phone Signal
WiFi
Awake
Screen on
Charging
When in normal use my phone doesn't show any abnormal wakelocks, it's just that the battery drains quite (too) fast when idle, can't seem to figure out why.

Bump
Sent from my HTC Sensation Z710e using XDA App

Android OS consuming too much battery!

last night i slept for around 8 hours, before i slept, i had battery power at 65% left, i wake up in the morning to find 27% left! now i think that verrryy much for idle state as my wifi, edge, games, calling/texting and screen were completely turned off for many hours. i look up the battery stats and found that Android OS had consumed 51%. below is the screenshot.
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somebody please tell me why is that? and how do i get more life out of my battery?

Maybe your phone only goes up to 9 hours...

Maybe it's kernel related.. Are you on custom rom already?

My Droid on a JB ROM has the Android OS consume about 90% of the battery and it dies after 8 hours of screen off time, airplane mode. *shrugs* if anyone has a solution id like to know.
Sent from my MB508 using xda premium

This has probably to do with something that is running in the background.
your phone apparently doesnt go into "deep sleep mode" Only in this mode you lose just few % per night.
I recommand to shut off your phone, take out the battery for a few seconds, put it back in, charge it in one go, then turn it on again. See what happens.

You can, of course, sleep with the charger in.

Welcome to Android, for the most part, our battery life sort of sucks :/

WiFi is always On on battery sats

Below is the screenshot of my battery usage. I disabled cell radio and WiFi at 12 midnight until 6am. As you can see radio is off (see the gap) but my WiFi has no gap. I can assure you the WiFi is disabled. I don't see the WiFi icon during those time. FYI since I got the phone last January I really don't disable my WiFi even if not in use. Is this a bug?
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motogmoko said:
Below is the screenshot of my battery usage. I disabled cell radio and WiFi at 12 midnight until 6am. As you can see radio is off (see the gap) but my WiFi has no gap. I can assure you the WiFi is disabled. I don't see the WiFi icon during those time. FYI since I got the phone last January I really don't disable my WiFi even if not in use. Is this a bug?
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In Wi-Fi advanced settings make sure "Keep Wi-Fi on during sleep is not set to always (Default)

Thanks man. What does "only when plugged in" mean. So even if I set it to always, it does not consume battery? Because I can see that I improve battery after disabling radios. Like I save 8% of battery.

motogmoko said:
Thanks man. What does "only when plugged in" mean. So even if I set it to always, it does not consume battery? Because I can see that I improve battery after disabling radios. Like I save 8% of battery.
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1. always on even in sleep
2. only on in sleep if phone is being charged
3. never on in sleep

Why does the never, increases the data usage? If its never On in sleep. Haha. I'm sorry I'm so dumb haha.

Galaxy S6 Running Android 7.0 WiFi Battery Drain

So basically just out of nowhere, about 2 weeks ago, my phone's battery just starts dying really quickly when connected to WiFi. I am talking from 100% to dead overnight (7-8 hours). It's an S6 purchased on release day, original battery, but before this issue, I could easily go a day with normal use and have 40% or more. Even now with the problem occurring, I can leave WiFi off and still get my normal battery life.
No settings have changed (I have always had all the suggested battery saving settings set appropriately), no system updates, just usual app updates. I figured an app update caused the issue so I factory reset the phone with no luck. I ran a suggested app, GSam, to check for usage. It hasn't shown any apps consuming the power, just power draining very quickly when WiFi is enabled.
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Not sure why this screencap is so huge, it won't let me resize it on here. Anyway, it's a screencap from GSam. The first half shows during the day with minimal use with WiFi off. The steep drop just before the green line is usage when I get home and have WiFi on. The solid green line indicates charging. After that is the overnight period with WiFi on, massive battery drain.
I'm at a loss at what to do. I really like this phone and this WiFi issue is killing the usability of it. If I'm at home and browsing apps with WiFi on the phone dies so quickly. If this were an issue regardless of WiFi, I'd understand that it's just old and a dying battery, but it's only ever present when WiFi is on.
Besides trying a custom ROM, is there anything else I can try to fix this? I don't have it rooted and would prefer to just keep it official firmware only if I can.
Thanks in advance.