The 12V NiMH battery pack is made by connecting 8 NiMH cells with a single voltage of 1.5V in series. The size and weight of the battery pack is larger, but due to the high safety of NiMH batteries, generally NiMH battery packs do not need to be used with protection plates. At present, you can also use four single voltage of 3.2V LiFePO4 cells in series to replace the NiMH battery pack.

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