How many voltage lithium batteries should you replace?

You can check the old lithium batteries parameter of voltage,or see charger's output voltage:

1.If 48-58.8V: 48V Battery.html target='_blank'>Lithium Battery

2.If 60-71.4V: 60V Battery.html target='_blank'>Lithium Battery

3.If 72-84V: 72V lithim battery

P.S:

Different voltage chargers can not be universal.

Especially lithium batteries should use a dedicated Lithium Battery charger