I used an Iniu slimmest battery. I like it but I think if I were on the AT I’d purchase the Nitecore NB1000.

Check this out! https://www.amazon.com/dp/B07CZDXDG8?_encoding=UTF8&psc=1&ref_=cm_sw_r_ud_dp_SH1EBHPQ2T4GK1NDKXHC

Does anyone on here use a portable cpap on long hikes and if so which battery do you use?