Solutions are displayed which match your selected specification «On a mobile device».
Make sure you selected all specifications which apply to you.
Calibrate your battery
If your battery drains quickly all the time, it might need calibration. This process, called calibration, helps your device estimate its battery life more accurately. It is recommended that you periodically drain your battery totally and then charge it up until it’s completely full (From 0% -100%). You should do this at least once per month.
Please note that calibrating your battery will ensure that you know when you need to charge the battery, but the procedure itself doesn’t actually prolong the durability of the battery.
Avoid placing your laptop or mobile device near a radiator or on the dashboard of your car (mobile devices), or near other electronics that are radiating heat.
If a battery gets too hot all the time, it can degrade faster and extreme temperatures can even cause the electrolytes in the battery to ignite and start a fire (though this is an extremely rare situation).
Note (laptop users): You can reduce the temperature of your laptop by placing it on a cooling pad.
Avoid exposing your device to extremely low temperatures because they increase the internal resistance of a lithium-ion battery (used by every mobile device and laptop), by slowing down the electrochemical reactions, causing it to work less efficiently. As such, batteries that are especially cold are likely to see a decrease in performance, i.e they drain quickly.
Luckily, cold conditions have no real long-term effects on a battery, so it should return to normal state once it gets warm.
If your battery drains faster and you don't have access to power outlets, you can turn it off if you don't intend to use it. You will save battery and your device will have enough power when you need it the most.
Note: You may also enable an option to show battery percentage, to keep a close eye on the battery, following the steps below:
Android (taken on a Samsung Galaxy device - steps may vary from one device to another):