Nexus S battery drains after updating to 4.2.2 even if turned off My Google Nexus S battery drains after updating from 2.3.7 to 4.2.2, even if it is turned off. One night I shut it off at 70% charge, and when I turned it on in the morning it was at 9 or 10%. I bought a new battery but it has the same problem. What should I do?
You should calibrate your battery:


Fully discharge your phone
Fully charge it when it is turned off
Disconnect charger and wait a minute
Connect it again and turn your phone on
Delete your data/system/batterystats.bin file (with battery calibration for instance)
Reboot your device and disconnect charger


Also, it is common problem, so try to google it yourself

Hope this will solve it for you