Updated to ios 7, the ipad 2 wifi is now so lagging, but understandable, since it is a 2 years old spec. But what unexpectedly is the battery life drop so much. Anyone experience the same ?

My ipad 2 rarely use, before update ipad 2 can last me around 4 days or more just need to charge, but now mostly 2 days only. Usage is almost the same though.

May consider to downgrade it back to ios 5/6 if possible

http://gizmodo.com/how-to-take-care-of-you...dium=socialflow
Found this out for u

Thanks but done most of it already. I just cant figure out why so dramastic change from ios 5 to ios 7.

Turn on Airplane mode should solve ur issue.