Why is my battery life draining after auto update to Android 5.01 from 4.4.2?

[AC Question]

Battery life draining after auto update to android 5.01 from 4.4.2

[Kindly read before replying]

Hello,

I use an ASUS tablet which used to run on android 4.4.2 and is only 2 months old.

Few days ago, Asus auto updated my tablet to lollipop 5.01 and immediately I saw an impact on my battery usage and my free system RAM.

Before 5.01, I could go for 2 days [48 hours] on a single charge on moderate usage [mail, firefox, chat, PDF].

The RAM would stay at about 350 MB free [I have 1GB RAM]

Now, after the update, the battery drains like it has a hole at the bottom. It drains out within 12 hours!

RAM sits at 150MB and I have to constantly press the BOOST button to free up my RAM or the tablet becomes laggy.

I did 2 or 3 factory resets and clear cache from droid boot. Nothing happened.

I am very frustrated as this is hampering my daily work since battery doesn't lasts till I get home from work or even dies at work.

I tried several times to go back to android 4.4.2 [downloaded the image from ASUS website] and did a system recovery but it failed.

I would appreciate it if anyone could kindly lend some helpful assistance or even better, a solution to this problem.

I would like to :
1. Either keep lollipop and get rid of the appauling battery drainage and RAM issue, which is unlikely as it seems to be a universal proble.

2. Go back to kitkat 4.4.2 and would like to know how to do that successfully.[preferred]

Asus Tablet Model:
ASUS Fonepad 7 FE375CG K019
RAM: 1GB
ROM: 8GB
OS: Android 5.01

 

[itguyjax8430]

Re: Battery life draining after auto update to android 5.01 from 4.4.2

More than likely you have the WiFI problem that has plagued 5.0.1 along with the RAM issue. It is all fixed in 5.1 but I am not sure when your tablet would receive that update.

Going back may be a little trickier, you will need to unlock your bootloader, install a custom recovery, and then find a stock image that is in ZIP format for flashing.