Battery cases solve that for me. I have the largest phone with the largest battery but it's still often not enough. I could carry an external battery like many

Battery cases solve that for me. I have the largest phone with the largest battery but it's still often not enough. I could carry an external battery like many people but I've watched them (a) forget the cable (b) forget the battery (c) forget to charge the battery. Having a battery cases solves all those. No cable needed, no chance to forget it (well except forgetting the entire phone) and no forgetting to charge since it charging one charges both. It does make the phone larger, thicker, heavier and means I can't have one of the sexier cases but I choose usefulness over looks for this situation