Enerland Based 25C 4900mah Lipo 4S
 

I went ahead and went with this pack based on its dimensions and the fact that its similar to a trakpower 4900 lipo. Mine is a PolyRC version.

This pack does fit the original RC Product Designs Tray, and should fit the Novak ones which I believe are 7.4V lipo sized.

The weight is significantly less than a Maxamps 6000mah lipo, and its lower profile too.

Will report here what I find performance and runtime. One really nice thing is the size of the wires used,maybe 10 gauge?

Im starting to think we need a specific Lipo thread- there is tons of info & experience with many different lipos spread around RCM, but I can never seem to find it, lol. Let us know how they perform (what cehicle is this/motor/esc?).