1. Before using the new battery, Please read the ASUS A56CB battery maintain parts of the user manual carefully.
2. When charge your battery first time, Please fully charge 12 hours. The new battery need three times charge/discharge cycles before achieving maximum capacity.
3. If a long time (three weeks or longer) without using a laptop or find the battery charge/discharge time become shorter than before, You should fully discharg the battery before charging next time.
Refer from: http://www.love-battery.com/product_detail.asp?id=9661