I have the anker 30,000 one that only change 2.5 time I took it camping it’s ok but if I have to do it again i’d rather buy 3 batteries
https://www.amazon.com/AUKEY-30000mAh-Portable-Lightning-Micro-USB/dp/B01HRAG2KM
I just bought this Aukey 30000 mAh charger and I love it so far!!