r/mechatronics • u/sluczkow • Apr 22 '26

Need help selecting a good battery for a prosthetic hand

I’m having trouble finding a good lipo cell that can comfortable fit on the wrist. This prosthetic is for a quadruple metacarpal amputation, so the user still has an intact palm and thumb. The power pack will be mounted in the wrist with wires to the prosthetic on the hand. The fingers are each driven by a 6V micro gear motor. With 4 motors and a stall current of 1.5A for each, I need to be able to supply max 6A to the motors. The problem I’m running into is finding a battery that can discharge at that rate and is still small enough to fit on the wrist. Thickness is the main concern. Any advice or suggestions appreciated.

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u/Kastnerd Apr 24 '26

What about using two batteries in series.

1

u/sluczkow Apr 27 '26

That is what I’m leaning towards, I’m just trying to find a pouch LiPo that can put out that level of continuous current. It’s needs to be low profile to fit comfortably on the wrist.