Promovec 36V with rear lights

NOTE: This battery needs a key, if the key is missing, to be able to discharge one should short the brown and orange wires.

Using our holders

We 3D print holders for this battery. They need an M3 threaded rod to keep the whole thing nice and tight.

Rebuilding it with a Daly BMS

This battery has an overcomplicated BMS. It does not communicate with the bicycle, and it only has an enable signal to(?) the charger.

However, it has an ignition, and a tail light. The ignition enables the battery and the tail light. The tail light is 2 5mm LEDs w/ a 1.55 kOhm power resistor in series. They run from the battery voltage.

There are multiple versions of this:

Where the charging port has a 3-pin connector

• Cut the black wire coming from the lock in half
• Cut off the 3-pin connector from the charger port
  • Lock half of the black wire goes to charger positive
  • Connector half goes to charger negative

Test it by plugging in a charger.

Where the charging port has two 2-pin connectors

• Ignore the small 2-pin connector from the charger
• Cut the orange wire in half on the lock
• Connect according to the diagram

Tall version

This battery has a version that is 'taller'

• Has  15.6 Ah capacity
• Different cell arrangement, and more cells
• UART communication - OPTIONAL!!

We can easily rebuild it using the same technique as above, but this time we can use a simpler safer spacer for 10s4p. There is enough space for 10s5p, but it would need custom spacers. For 10s4p, we can use the 'Tight tall 10S4P' model originally made for the Ecoride.