I own a Mudi v1, it is Chinese and 'just runs OpenWrt' (with mods). I had to use such device for a previous job (not w/eSIM tho). Battery life was good, but now

I own a Mudi v1, it is Chinese and 'just runs OpenWrt' (with mods). I had to use such device for a previous job (not w/eSIM tho). Battery life was good, but now not so much, and battery isn't user replaceable.