As mentioned, all batteries should be of same type, age and capacity. By mixing them, one or more will either over charge or undercharge. This will not initially cause a major issue, but over time one battery will fail and could cause the remaining batteries to fail.
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2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 100W solar panels
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