Originally Posted by morph999

You sure you want to go with SLA batteries? They really suck.

If you are planning on spending $150 - $200 for something that will last 1 or 2 years. Why not buy 3 of these 12v lithium packs http://elitepowersolutions.com/produ...products_id=74 for about $312 + shipping ...and if you live in the USA, shipping is usually only about $20. So $335 for 36v20AH thundersky lithium pack that will last 5 yrs or more or........you could buy a $150 - $200 SLA pack that will last maximum 2 years and that's if you baby it. Plus, lithium pack will get you 2 - 3x the distance. My advice would be pay the extra $100 - $150 and get the lithium. You can charge these with a 12v SLA battery charger too. And the lithium is half the weight of the SLA. If you don't already have a 12v sla charger, buy one of those....then buy a 3.2v lifepo4 2amp charger at all-battery.com and manually balance the packs. It'll save you money. Just make sure you know how to use lithium if you do decide to buy the packs. Those are the packs that I'm using on my bike. I don't work for elitepowersolutions. I just think it's kind of a bad decision to not buy lithium when it's only $100 - $150 more.

By the way, good choice on the motor. Heinzmann is a quality motor. For the controller, I don't know about those. I've always heard good things about the Infineon controllers so I'd probably recommend that. Besides, it has option for running either 36v or 48v battery. So you could increase the speed later with 48v if you wanted. Make sure you ask someone who knows what they are doing if this is the right controller or that one that you picked out is. Not all controllers are the same.

the only one I can find is $110....I didn't look very hard. You could probably find it for cheaper
http://www.cycle9.com/c9store/electr...2e200e71a2b11e