Clearly the E bikes don't come with a lithium BMS.Depends how...

Clearly the E bikes don't come with a lithium BMS.


Depends how much you pay.
I just converted my pushbike to an E-bike using a kit.
I paid more for Samsung cells in the battery and a battery mount and charger that incorporates a battery management system.
Some people buy cheap chargers when theirs fail which can lead to thermal runaway.
Also some say to extend a lithium batteries life you should charge it to around 85% and discharge it to around 20%.
With the occasional full charge to balance the cells.
When you charge them they tend to have two phases a quicker early charge but the last little bit takes a lot longer.

Also don't tamper with batteries
Which I have been known to ignore.
I've replaced the cells in power tool batteries before.
Buying Samsung cells and spot welding nickel strips to their ends using a spot welding kit and a car battery as a power source.