Yamaha Mid-drive Motor Dongle to Use 3rd Party Batteries

Yamaha mid-drive motor battery hacking dongle to use any 3rd party battery instead of the original Yamaha battery.

For the user manual see Yamaha dongle to use 3rd party batteries

Characteristics of the Yamaha battery dongle

1. You can use any battery on your Yamaha ebike instead of an expensive original Yamaha battery.
2. It is suitable for all kind of batteries from 24V up to 48V, provided that the maximum voltage never exceeds 60V.
3. The battery capacity is measured very accurately with an LTC2944 fuel gauge IC, not just simple voltage measuring.
4. Fuel gauge indication also on the dongle, with 6 LEDs.
5. To save power, the dongle turns off automatically when the Yamaha ebike is turned off.
6. The battery capacity is stored in an EEPROM so that it is not lost when switched off.
7. The data signal output has a short circuit protection.
8. The dongle can be programmed directly via USB.
9. A NRF24L01 wireless module can be soldered for use as a battery monitor / fuel gauge / Wattmeter.
10. The dongle is protected against reverse connection of the battery voltage.
11. The dongle turns on only when the Yamaha motor is connected and turned on.