@Sasquatch said in BATERY CHARGER CONNECTION ?: Tp4056 is linear regulator, very inefficient, look at spv1040 or spv1050 instead - MPPT tracking propper solar chargers. C-x b wiki.org -> Electronics <TAB> -> Components <TAB> -> Power -> C-u M-<RET> to create new sub-heading ("MPPT tracking solar chargers"), paste (Yank) useful info for future reference.