Originally Posted by dwainedibbly

That's the same kit that I have. Did you get the 7Ah battery pack, or the 12Ah pack? I'm still using the 12Ah SLA battery pack that came with my kit. I ride 6.75 miles each way to work, recharging at home & office, so they don't get a deep discharge. I have noticed that my unassisted top speed is down maybe 1 mph, but it's hard to say for sure because it's been windy here the last month or so. I have ~1500 miles on these batteries so far.

Heavy? Yeah, these things define "heavy". I broke a couple of spokes on the rear wheel (I'm 195 pounds) then I rebuilt the rear wheel with DT Alpine III spokes and a Mavic A719 rim. No problems now. Still, when these batteries die I'll probably switch to NiMH batteries. If I do, I'll go with a lower capacity battery pack, too.