To ensure longer battery life, it is important to learn how to maintian batteries of cellphones, tablets, etc. Let's make the cellphone battery as an example. For me, I like playing cellphone while it is being charged though I know it is not good for cellphones.... But gradually I just find it fast to drain out which is within my expect. So, I think I should maintain my devices. there are few tips for optimizing battery life. First, don't charge your phones with case on because the case cover may stop heat emision and make the device heat up easily. Second, you don't have to recharge it when the power is drained out. You can charge it anytime you want. Third, don't use your phone while it is charging. That is really harmful to your phone. Fourth, unplug the phone when it is fuly charge. Don't keep it charging for a long time, or it will be overcharged. Then, when you find your cellphones are overheating, stop using it right now and cool it down by placing it on the desk. I'm now using a qi wireless charger and I just can't play it while it is charging like I used to with a USB cable. LOL. So, maybe you can also try to stop some bad charging habits by having a wireless charger?