Adding a second spare battery doubles the range of the Firefly by an additional 15 miles / 24 km (stop and go and hills) to a total of 30 miles/50 km
Lithium Polymer batteries are the best quality available in the industry, lasting 5-10 years or more when properly cared for.
Charging Time ~4 hours if battery is fully discharged.
Charge your second battery with the charger that came with your Firefly or optionally order a second charger to simultaneously charge both batteries and be ready to go again in only 4 hours!
Batteries are warranteed free of defects in material and workmanship for three (3) months from the date of purchase.
You can charge it with the charger that came with your hand cycle, or contact us to order a 2nd to be able to charge both batteries simultaneously