I use LiPo 1.5v in mine. I bought these a couple years ago, they are still going strong, with occasional use (Sponsored links): https://www.amazon.com/gp/product/B08L99CGX1?ie=UTF8&psc=1&linkCode=ll1&tag=wrathernaut-20&linkId=ad6a73ebffac9031ab6ff193b0e386a8&language=en_US&ref_=as_li_ss_tl
which seem to be the same as these: https://www.amazon.com/Deleepow-Rechargeable-Batteries-Lithium-3400mWh/dp/B09N3D19N2?&linkCode=ll1&tag=wrathernaut-20&linkId=03241fc9e75024754cc25a43e5122b9d&language=en_US&ref_=as_li_ss_tl