When I travel I bring a spare battery. Then I don't have to keep charging the phone all the time, and sometimes it might not be possible. With a spare that's on

When I travel I bring a spare battery. Then I don't have to keep charging the phone all the time, and sometimes it might not be possible. With a spare that's one thing less to worry about. The second thing is battery degradation. After a while the amount of charge will drop, and replacing it with a new and fresh battery feels like giving the phone new life.