Decided to add 2 more 6 volt bats to my already 2. To make a total of 4. Need a recommend brand highest amps and where to buy. Also clarifying routing of cables. Goal is to make 1 large battery thx in advance.
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When adding to an existing bank I would buy 2 more of exactly eBay you already have and worry about maxing AH when you replace them all.
Above assumes your existing ones aren't too old. If they are then I would consider replacing w 4 new.
Don't mix chemistry ( AGM with Flooded or Lithium ) or new batteries with dead batteries, but brand and age, by a few years, if in good condition, will do no harm.
All brands of flooded battery's are 2.1 volts per cell.
Linear Mode
