Most Pokémon Go players have likely realized by now that the new Nintendo app is a battery killer, which seems more than a little counterintuitive when you consider that it’s a game all about being untethered and exploratory. While there isn’t a way to outright eliminate Pokémon Go’s hunger for battery power, there are steps you can take to prolong your Pokémon adventures significantly. Follow some or all of the following battery saving tips and you’ll be really be able to catch ’em all (or at the very least add a ton more Pidgeys to your collection).
10. Kill The Volume
While it may be hard for some to go without hearing the familiar cries of their favorite Pokémon, do yourself a favor and play Pokémon Go on mute. It will help conserve a bit of battery power and since this is a game that regularly has you travelling outdoors to busy, noisy locations, it’s not like you’ll hear much of it anyway unless you’re playing exclusively with headphones on (more on that in a bit).
http://pokemon.wikia.com/wiki/Sing Source: Pokemon Wiki