I use my Bionx bike as my commuter and put a lot of miles on it. I go through the equivalent of 4 complete charge cycles a week. Since the 36V Li-MN battery is rated for about 500 cycles, that means I would need a new battery in 125 weeks of use, or about 2 and 1/2 years.
A replacement battery from Bionx costs around $950. So battery replacement is going to be a huge operating expense for me. It's costing me about $1.50/day in battery cost. That's only slightly less than the gasoline would cost ( at current price of $1.75/gal) if I used a car instead of the bike.
I'd like to reduce this cost, if possible.
My first question, to any knowledgeable people out there, is whether there are just batteries in the Bionx battery case or whether the control electronics are also in there. If the latter, shouldn't Bionx or a 3rd party group replace just the batteries at a lower cost than a complete battery box replacement? I tried to contact Bionx about this, but no luck.
My second question is whether anybody knows of any 3rd party agencies that might do this. I noticed that OHM Bicycles, which are based on the Bionx, must have their own batteries as one of their bikes uses a 36V 12Ah battery that is not offered directly by Bionx.
I might even try to do the battery replacement myself. For instance, I could purchase a 36V, 10Ah LiFePO battery pack, plus a fast charger, from one supplier for about $625. This would result in a superior battery pack, as the LiFePOs have a much higher charge/discharge rate and are suppose to be good for 2000-3000 cycles at the Bionx discharge rates. Plus you can charge them much quicker than the Bionx batteries. You can safely recharge them in 20 minutes with the right charger, although the charger being offered would take 2 hours.