Motor mover + Li-ion battery = fail?

Nov 24, 2025
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So our small Swift Excel 382 caravan came with an enduro em203 motor mover, which usually works, but sometimes it fails and flashes 4 blue lights on the receiver, which is an overvoltage warning. Apparently this is happening because I replaced the lead acid house battery with a 12V 100Ah LiFePO4 Battery which, when saturated, outputs more voltage and a traditional battery, and that makes the motor mover shut down.

What can I do to solve this, other than spending an hour purposely running down my battery to get it to outputting lower voltage whenever we need to move around, which is incredibly inconvenient as one might imagine!
 
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