#10 dogman Offline Joined: 04/29/2008 Points: 830 Re: blade-z 450w motor extra range v. extra speed moot point if you buy 2x ah and now tend to use only 60 percent discharge, or go further and still get close to 1000 cycles, boo hoo. lifepo4 cost per trip is an issue at some of the prices i have seen. i would say worth it for good support,especially if local. on the other hand, if cheap lead fits your u