I have one anker power bank that is easily 4 years old, and has survived daily use, with lots of drops, and many trips, domestic and international. Ended up purchasing a second larger capacity, and seriously considering a 3rd to power the iPad. (Well now that I’m looking it up in my purchases they are both 10k mAh but, the newer one definitely charges more devices per recharge, guessing that is just newer technology, because I have not noticed less charges per recharge over time.)
Cannot say enough good things. Buy anker. They will last you forever, and just absolutely be worth the money. Purchased both of mine on
amazon.