Do you play a lot of Pokemon Go? If so, it probably drains the battery of your smartphone quickly as Pokemon Go requires your screen to be on while playing to be notified of new Pokemons nearby.
If you want to save a ton of battery life while playing Pokemon Go on any Android smartphone or tablet, you can try the Battery Saver Pokemon Go app.
This app will keep your screen as dim as possible while displaying 100% black background. For smartphones that have AMOLED screen(such as Galaxy S7, Galaxy S6, or any Samsung phone), this will mean almost 100% in battery savings as AMOLED screens use zero energy to display blacks. Even for LCDs, this will save you a ton of battery life.
If you are addicted to Pokemon Go and want to make your battery last longer, definitely try this app out and do let us know what you think!