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DeWalt, or any other power tool battery adapter like this: https://www.amazon.com/HICOPEET-Compatible-Motorhead-v7-v8/dp/B0CTTBFWZ1/ https://www.amazon.com/HICOPEET-Compatible-Motorhead-v7-v8/d... Power tool batteries have BMS, better chargers, and if you have multiple batteries, you get infinite vacuuming powers.