Charger

MDA Li-ion Battery Charger

This is the battery that ships with the original bike.

• Manufacturer: https://www.mdacharger.com/

• Model: BC254480030

• Input: 100-240V ⏦,2.5A (max) 50/60Hz (Alternating Current)

• Output: 54.6V ⎓ 3.0A (Direct Current)

• Back of the Unit Notes:

  • Red Light when charging

  • Green Light when fully charged

• Cable - 18 AWG

• Connector - 3 pin with a proprietary connector

  • Center pin looks unused

  • Lower Left pin is Negative

  • Lower Right pin is Positive

Modification

A guide for modifying the charger, and optionally the battery itself, to work with Grin Technologies Cycle Satiator: https://www.reddit.com/r/Super73/comments/invi7q/upgrading_to_a_better_charger_a_guide/

There's a relevant quote in the guide regarding the center pin:

We only want the red and black to be terminated properly as the Yellow Signal wire is not really used for anything inside the battery pack itself.