I've been trying to check into an extra set of batteries for my vmax. When I brought it home a member suggested AW IMR 18350's and also the web site. When I went to check em out the vender was out of stock. I looked in the different forums and found some prefer the AW brand and other's prefer eFest. I looked at the specs on both and the eFest put out 800mah and the AW put out 700mah. My vmax kit came with (unknown brand) 900mah. Long story short is I ordered a set of eFest IMR 18350's along with a Xstar WP2ll charger along with a couple of sets of extra spacers. I tend to lose things sometimes so would rather have to many spacers than not enough. Does this sound like a decent setup for my vmax. The charger that came with the kit will only charge one battery at a time. The one I ordered will charge both at the same time. This is my first APV and so far I like it. (But then I like my twist's and my kGo's also.)