Apps and Multimedia
Apps and content that keep the device awake over an extended period of time can quickly drain the battery (e.g.playing games or watching movies). Some apps are particularly power-hungry, especially if they use features like GPS. Ensure you close apps when not in use, and if you are out and about and using apps that you know are power-hungry, consider investing in a rechargeable battery pack. if you do not expect to have anywhere to charge your device.
How are you charging your device?
If your battery is charging slower than you expect, make sure you are using the right charger as the amperage on chargers can differ. Always use an official Samsung charger, preferably the one that came in the box. If you need to replace your charger, check that the amperage of your new charger is appropriate for the model of your device. The power output of power source will also affect charging time. Charging your device directly from a power outlet will charge it faster than if you plug it into your laptop.
Avoid fully discharging your battery
On much older types of batteries, the advice used to be to discharge them completely. This is not the case for modern smartphone batteries. Completely discharging the battery on your device may reduce its life.
It's best not to let your battery go under 20%.
Storing your device
If you do not intend to use your device for some time and pack it away, ensure that it has at least 50% battery.