the best way to keep your battery last longer is... 1.if it still new then insert it on your device & recharge it without switching on your device.... 2.at 1st recharge just recharge it until it full...some shop said to recharge at least 8-10 hour...dont do that cause if you do then your battery will not last longer... 3.after your battery running flat always recharge the battery while your device is switch off...dont not charge will the device is on cause you will not get full charge of the battery.... 4.if you have an external charger then use it rather than recharge it using your device....external charger got it advantages...method 1,2 & 3 can be done with it & you can use your other battery (old battery) on your device before you change the battery after recharge...