There's a 'battery saver' mode in 'Pokemon GO' - here's how it works

"Pokémon GO" is a battery hog, especially when you go on a long walk and want to make sure the app is searching for Pokémon the whole time. Luckily, there's a really handy "battery saver" mode that will help you get a lot more mileage off a single charge.

Here's how it works.