No. I only have the one that came with it. I did 54 miles today and was down to I think 87 volts. I'm pretty sure it kicks you off at 70 volts, so I was almost half way through the battery.
@nhguy9950 that's a solid start, we rest while we charge but we do like 50-60 miles at a time. Archee has a custom wheel with 7200wh of battery... DOUBLE what we have lmao