Should I replace my iPhone battery?

Episode 1530 (1:36:53)

Max from West LA, CA
Apple iPhone SE

Larry wants to know if he should spend the $29 to replace his iPhone SE battery considering the battery is over 80% capacity. Leo says that the charging capacity will continue to drop as he continues to recharge the battery since there's only a limited number of recharges he can have. But having said that, with over 80% capacity, he's probably alright. Realistically, replacing the battery will probably only add six months to that phone's life. But the battery replacement on the iPhone SE is $79, not $29.