Lithium Motorcycle Battery Dead

If your lifepo4 battery has stayed at low voltage for very long.

Lithium motorcycle battery dead.

Remember usb is only 5v so your dead li ion battery needs to be rated under that. Lithium ion cells don t like to be discharged below their over discharge voltage usually between 2 5 and 2 75 volts at the most. But it s not recommended to drop below 12 85 20 for max life. However many li ion battery systems on the market are made from large prismatic cells connected to an external management system.

Lifepo4 is all but dead at 9 5v. Lithium battery failures the technology has advanced enough to include battery management systems bms which balance the discharge and recharge loads. You can check the age of the battery pack and measure the voltage if able or check for date codes on the circuit board inside. So yes a dead battery pack may be jump started by simply applying a charging voltage until the cells regain an appropriate voltage allowing the battery management system to reconnect for discharge.

If your bike produces less than that because of a tired charging system the lithium battery will not charge and it will ultimately run out of juice leaving you high and dry. What hurts batteries of all types is staying dead for very long. Bms shuts down the battery if an overcharge is detected to prevent overheating and the potential to catch fire. It may not recover and or lose it s rated ah capacity.

Step two give the battery a full charge discharge plug the battery into your lithium ion charger and give it a full charge. A healthy motorcycle charging system puts out about 14 volts at 2 000 rpm and a lithium battery needs between 13 and 14 volts to charge.