Thanks a lot for you comment. Funny enough, I doubled the battery life (from 40s->80s) in a patch about 15 minutes before submission deadline because all of the people who had playtested it were dying multiple times and I intended for the game to be beat without dying or only dying once. Basically, I was scared of "wasting" the players time by making a game too difficult because there are a lot of games in a game jam for people to try. In hindsight, I wish I had more time to develop a better solution than doubling battery life.