Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post - Adding 2 6 Volt Batteries to existing 12 Volt

camper4 · 12-20-2011, 02:45 AM

Battery makers recommend against mixing. They also recommend using batteries with similar lifes if connecting in any way. If going to 6 volts get two new ones to start with.
If going to 12 volt batteries, get two new ones to start with.
Mixing new and old batteries will work together but the older battery will draw the new one down to its level.
IMHO technically you can mix the batteries but for optimal performance go with the makers recommendations.

12-20-2011, 02:45 AM	#3
camper4 Montana Master Join Date: Dec 2006 Location: corning Posts: 694 M.O.C. #6635	Battery makers recommend against mixing. They also recommend using batteries with similar lifes if connecting in any way. If going to 6 volts get two new ones to start with. If going to 12 volt batteries, get two new ones to start with. Mixing new and old batteries will work together but the older battery will draw the new one down to its level. IMHO technically you can mix the batteries but for optimal performance go with the makers recommendations.