iPod touch battery life change with update . . .

[russell1256]

I have a 3rd gen itouch. before upgrading to 4.1 (I passed on 4.0), I did not have to recharge for several days. Not I have to twice a day. I go to bed with a full charge, and in the morning I get the 20% warning. I use the wifi sometime during the night, so I don't want to turn on air plane mode. Any ideas? Russell

 

[Ace134blue]

Calibrate your battery and/or restore it from a backup

 

[russell1256]

how do I calibrate it?

 

[eddy2099]

One method would be to fully charge the ipod touch and then use it till the battery reaches the 20% mark (ie the warning) then go charge it again. Do this once or twice more. That should calibrate the battery.