El_heffe, as far as the switch configuration you mentioned, anything's possible. But I'm a bit puzzled on how some are running the two battery packs at the same time? This would be 48 volts. The ezip runs at 24 volts. I know it can handle 36v but 48? If I could afford it, I'd sure get lithium batteries. Also keep in mind that Dewalt now makes 36volt battery packs for it's tools and some bikers are wiring several of these in series. They are extremely light weight and are good for several thousand charges and don't develop memory. Pricey though.

The WalMart ezip comes with an A-B switch. It runs on one pack at a time and when the first A pack is empty you select the B pack to keep going. One could rewire the pack in parallel instead of series. 24V is maintained, but the Amp/hr add up instead for a longer range. One of the benefits to a parallel connection is two packs can be recharged overnight with only one charger.

I'm aware of the ezip's battery switch; I have one. What I meant was that some people here have mentioned running 48 volts to the motor, not just the standard 24v at a time. I do think the ezip can handle 36v to it at one time but it seems that 48v would either burn up the motor or overheat it quickly. As far as the Canadian 20v battery, that's an odd voltage. Too little to run the Currie motor and two together would be too much. If Currie was on top of things, it looks like they'd make lithium battery packs to fit our ezip trailz bikes. They'd be expensive, but at least an option. Just think of all the extra weight we'd lose from the bike and the increased efficiency. I guess one could remove the lead acid batteries from the ezip cases and replace with lithium. At least it could be done at any time in the future as lithium prices come down.