Ultraviolette Bikes

Ultraviolette F77 Space Edition comes equipped with three removable lithium-ion battery packs that measure 4.2kWh in total and allow the F77 to cover 150km on a full charge in urban conditions.

You need no license or registration in India for scooters that have their top speed capped at 25km per hour or has a motor of 250W or lower. However, the Ultraviolette F77 Space Edition is powered by a 32000W Motor and the top speed is around 152 kmph, thus requiring license and registration.
 

The Ultraviolette F77 Space Edition comes with a built-in 1kw AC charger which plugs into your household three-point power socket. The claimed full charge time is 5 hours. A 3kW DC fast charger will be offered as an option and the brand claims full charge can be achieved in just 1.5 hours. It needs a 15 amp socket and would cost an additional Rs 20,000. And the final option is a “Home Charging Pod” which can hold upto three battery packs. You can simply remove the battery packs from the motorcycle and charge them at home on the pods. To further reduce range anxiety, Ultraviolette will also be selling the battery packs separately.
 

For that, we'd suggest you to please visit the nearest authorized service center of Bajaj Motors as they would be able to assist you with the exact price and availability of the spare parts. Follow the link and select your city accordingly for service centers.

It would be unfair to give a verdict as to n to change the battery as it depends on the battery health, usage, proper maintenance of the vehicle etc. Moreover, you can get in touch with the authorised service centre as they are the best ones to assist you with this concern. You can checkservice centres here.