I bought a few batteries renogy 12 100 ah then I decided to try making one using 3.7v 18650 batteries linking them in series you can build a much bigger battery for the price of those already made batteries FYI
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I watched a few videos on that and it seems a little more involved which I’m not afraid of in theory. The only thing that makes me want to buy the $200 dollar premade batteries is it seems like the individual cells you Link are Li-ion vs the LiFePo4 with the renogy/ speed queen batteries