This should take around 3 hours depending on what type of li ion battery you are reconditioning.
Lithium motorcycle battery dead.
However many li ion battery systems on the market are made from large prismatic cells connected to an external management system.
But it s not recommended to drop below 12 85 20 for max life.
Most of the time these batteries will be dead and i mean dead.
Bms shuts down the battery if an overcharge is detected to prevent overheating and the potential to catch fire.
If your lifepo4 battery has stayed at low voltage for very long.
Lifepo4 is all but dead at 9 5v.
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.
Remember usb is only 5v so your dead li ion battery needs to be rated under that.
A lithium iron motorcycle battery is very light and is supposed to hold a charge for a very long time but if you re lithium iron motorcycle battery goes dead you can use a car battery charger set.
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.
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.
What hurts batteries of all types is staying dead for very long.
It may not recover and or lose it s rated ah capacity.
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.