how do i do this for like say 5-8 hours a day?

my phone dies so fast, i don’t know if it’s because it’s an older-ish phone, or because i rely on the gps too much, or maybe something is killing my battery secretly, but my phone will MAYBE last two hours if i’m doordashing and the car i mainly use doesn’t have a reliable way to charge it so i’ll have to bring my laptop or charge it somewhere else and it’s just so inefficient.

please give me advice on how to avoid this, if there is a reliable way.