We are not going to give you too much gyan on what to do and what not to do to extend the battery life of your phone. But just try to follow these rules, if possible. It will definitely help you save a few bucks.
1) Avoid high temperatures
Heat speeds up the chemical reactions taking place in your phone’s battery, and that means you’ll have to charge it a lot more often. Also, extreme heat can cause thermal runaway and boil the liquids in your phones battery—which can damage it forever or make it explode.
2) Don’t let the battery fully die
Despite what you may have been told, you don’t have to let your lithium ion battery completely die before charging it (unlike nickel batteries). Lithium ion batteries never “forget” their capacity, but the maximum capacity does degrade over time. And you actually speed up your battery’s degradation by letting it lose its charge. If your phone is about to die, just turn it off yourself to avoid the damage.
3) Always store it at 60%
If you’re going to be away from your phone for a while—like going on vacation, or trying out a different phone—turn it off when the battery is 60% charged, and store it in a cool place. This will prevent capacity degradation and permanent damage to the battery or phone. This is why when we switch on a new phone the battery charge will be at 50% – 60%.
Tip: There is no problem with leaving the phone/computer/tablet/etc. on the charger, the battery will not be overcharged or be damaged by staying plugged in. The charge controller will float-charge the battery as needed, the occasional top-up if it goes below like 95% or whatever the engineers have chosen for the design.
No matter what, smartphone batteries will lose some capacity as you use them. In fact, it’s estimated to be anywhere from 4% to 20% capacity loss every year. But with these tips you should be able to keep your battery in ship-shape until you decide to upgrade.