Android OS eating battery even when in sleep mode.

[dency45]

This always happen every night. When im not charging my phone overnight android OS eating my battery. My battery is 89% then when i woke up it is 71%. The other day it is 36% then when down to 8% even when in sleep mode.
EDIT: Do not mind the 16 hours shown there. I did not charge the nexus 7 100% and the time will only reset when it is unplugged from 100%.

The main problem is that it ate 17% of battery even at 6 hours sleep mode.

 

[Andyvalver]

I dobt know if this is normal or not but I'll wait to see what others say because my mate has a similar problem with his s3

Sent from my GT-N7100 using Android Central Forums

 

[geekymcfly]

Afyer being on for 16 hours id say its normal.

Sent from my SGH-T999 using Android Central Forums

 

[Diknak]

You can use BetterBatteryStats to confirm this, but it is most likely your WiFi. What is the WiFi network type?

My work WiFi does the exact same thing to my tablet and phone (started in 4.1) but my home WiFi does not. It is a WPA2 and for some reason, it is constantly sending data to my devices and preventing them from going to sleep, so I see the exact same Android OS keep awake that you are seeing.


The solution for me was to get DS Battery Saver Pro and turn it on when I was at work and it has worked like a charm.


If you are having the same problem that I am, better battery stats will report that your culprit is wlan_rx_wake.

 

[Diknak]

Afyer being on for 16 hours id say its normal.

Sent from my SGH-T999 using Android Central Forums

No, 4.5 hours of Keep Awake time is not normal.

 

[wunderbar]

On pace for about 2.5 days of time on the battery. Seems pretty reasonable to me.

 

[DavdEBSmith]

As a comparison, right now mine has been off the charger for 28 hours. Battery usage 1.4% per hour. Better Battery Stats says 47% deep sleep, 53% awake. 3 hours of wifi wakelocks. But of the awake time, half of it the CPU is running at 51 MHz, the lowest speed.

Some Android devices have issues being kept excessively awake by some wifi devices. A solution is to turn off wifi when the tablet is not in use. But then it's not continuously updated and ready to go when you turn it on.

It's easy to narrow it down to a wifi issue by turning wifi off for several hours. Then the problem is, there may not be a solution you like.

 

[geekymcfly]

No, 4.5 hours of Keep Awake time is not normal.

My nexus7 doesn't come close to 16hrs and having 71% left on it. Even with 4hrs screen time. That seems normal to me

Sent from my SGH-T999 using Android Central Forums

 

[dency45]

Afyer being on for 16 hours id say its normal.

Sent from my SGH-T999 using Android Central Forums

no it is not. it is in sleep mode and im asleep for 6 hours. it should just take 0-1% off the battery.

 

[dency45]

it ate my battery 17% even in 6 hours sleep mode.

 

[dency45]

On pace for about 2.5 days of time on the battery. Seems pretty reasonable to me.

no. it ate 16% of the battery even at 6 hours sleep mode.

 

[jpash549]

Put it in airplane mode before you put it to bed.

From my N7 or BBPB or HPTP or HP Laptop