Well, I dislike waiting around for my battery to charge almost as much as I like more speed.

Nice work DA.

My 17mph 10ah 450 watt geared hubmotor "mtb" conversion sips energy as long as I keep it under 16mph (most of my riding is on level ground). I'm pretty sure that you could get well over 25 miles out of it if you wanted to (I tend to pedal most of the time). I don't think I've ever pulled the battery down to less than ~ 40%. Meanwhile, I only get about 18 miles or so out of my 20mph 10ah 750 watt direct-drive Worksman based "board track replica" (the low bars and seat height are, of course, much more suited to "e-power" riding than my more sedate mtb conversion).

I've given some thought to converting my DD BTR over to a 48-52 volt 22amp 25+ah lipo battery in an effort to reach 28-32mph (I already have an upgraded controller that will handle the amp and voltage increase). This level of performance would also (imo) require a powerful drum or disc front brake. Projected range on this upgrade will be...well...let's just say that range will be at the bottom of the performance chart...

However, I'll probably spend the money on a solar battery charger before I upgrade the BTR.

Wait a minute (or hours)...didn't I just say that I don't like waiting around for my battery to charge?