I found these cheap voltmeters on ebay - about 4 dolalrs delivered.
They make a nice replacement to the Standard Aprilia LED unit. It makes for a good way to ensure I don't discharge my LiPo batteries past 29.6 volts.
Shown below with the old NiMh battery inserted into the bike - hence the low reading.
I removed the bezel from the new ebay unit, dremeled out a new area inside the old aprilia backing, and put the clear cover back on. Magic.I even added a waterproof switch thru one of the Aprilia's standard bolt holes in the plastic cover - shown with the controller still hanging out....
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