Buy a power bank, close everything else, use low screen brightness, turn off sound
How does turning off the sound have something to do with the battery ?
I saw some 9gag post about downloading your towns map to save battery, you'll have to search for yourself for more info though, i'm lazy + you can always turn your screens brightness down.
i give u a guide with few steps ok?1-remove that thing2-go to a bar3-try to get a woman4-dress that woman like cynix5-GZ U CATCHED A JYNX