Hmmm that's a 2-cell. I'm kinda new to electrics, but if I'm not mistaken, that's a 7.4 volt pack and is for smaller heli's (Blade CP, for instance).

I'll second the Thunder Power lipo's, I picked one up at my LHS for around $50 (and I thought I was getting a hefty markup...sounds like this is pretty much the going price) and it's great. Compared to the cheapy thing I got with my Walkera (ugh) it's a world better. TP seems to be serious about what they're doing, and the pack appears very well made and packaged. The heavy clear plastic "wrapping" they add probably saved me a trashed lipo the other day when I had my first major crash with my Axe. I have the 1320mah, and can fly for around 10 minutes depending on what I'm doing. In idle-down mode I was getting around 12 or 13 minutes of easy hovering, but while flying outside in idle-up and doing more than just basic hovering, I stop at 10 minutes. In fact this morning the battery started to go RIGHT at the 10 minute mark, after sitting overnight (so it probably wasn't quite at 100% capacity).

Oh and the little instruction thingy they provide with the pack is great for lipo newbies like myself, and has some handy guidelines and numbers to take note of (maximum ambient temp for charging, storage voltage, etc).