Powell,

I find posting to this site very frustrating. I logged in, wrote a detailed summary of my successes and the limitations I found in converting the the E+ to a external lithium battery. When I actually "post" the site say I must log in. I log in and my work is gone, never to be found. I'll must remember to copy the post before re-logging on.

I'm riding the E+ considerably and learned to deal with the quirks of not charging Lithium batteries through the charge board. I discussed some in the post to JLV above. One I forgot to mention is regen braking issues. Since the charge boards think the SOC is always near zero, regen engages even if the batteries are full (40V). Not good. I've had the hub wheel jerk, almost lock, when regen engaged with a full battery and then I punched the throttle to go. I don't think the software can properly deal with conditions that were never anticipated. I put a switch on the brake sensor wires to prevent regen and that stops the problem. The truth is I get little benefit for regen on a single bike. Wind resistance slow me enough for my hills and my style. I've turn regen back on occasionally when the battery is down, but I'm still nervous a lock will occur. It was no fun.