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I'm in the process of building my first 12v lifepo4 battery but the BMS test is rather concerning. My leads test fine at 3.3, 6.6, 9.9, but when I test the last lead my meter goes crazy! I'm hesitant to go any further until I have the issue cleared up. Any suggestions? Tia

Are two 12v 100ah batteries in parallel the same as one 12v 200ah battery?

Is a BMS required for both batteries if hooking a diy battery to the same parameters manufactured battery with a BMS?