Lithuim weigh so much less personally everyone should add one due to the weight you will not carry around anymore. Besides these are so much better plus have an indicator to check charge anytime.
Normal 12 volt 2 amp charges will work fine on these it what I use.
This model is offered at an affordable price there is not reason not to add. With reduced weight the shipping cost goes away. Batteries are 9.99 ship so price is reduce to our normal flat 7.99 for all part under 99.99.
Replaces 7A-BS fits almost every four stroke scooter, two stroke such as Yamaha Zuma 50 and CPI use 5L-BS