Sep 13, 2016 - 06:07 AM
MAINTAINING MULTIPLE BATTERIES Batteries should be charged individually. To properly maintain multiple batteries they should all be the same type (gel, flooded or AGM) and condition. It is OK to mix deep cycle and starter. Charge each battery individually before connecting together. Never connect batteries at different states of charge. The charged battery will rapidly transfer energy to the discharged battery possibly causing catastrophic failure. Once the batteries are charged, use 18 gauge or greater wire to connect the batteries or for greatest safety protection and ease of use, consider investing in the BatteryMINDer Y-Connector Model 210AY with SmarTECHnology*.