You can check the old lithium batteries parameter of voltage,or see charger's output voltage:
1.If 48-58.8V: 48V Lithium Battery
2.If 60-71.4V: 60V 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
Contact: Cindy Huang
Phone: 0086-13727008595
Tel: 0086-0756-6835803
Company: Zhuhai Future Energy Technology Co.Ltd
Add: Fushan Industrial Park,Doumen District Zhuhai.GD.China