I have a balsa products 2s1p 1500 mAh LiPoly battery for my dandy sport (eps 350c-c, 10x8 prop). The guy at the LHS where I bought the battery told me that I could expect 45 minute flight times with this battery. Well, I tested the battery on the ground in my plane with the throttle holding at about 75%. The motor cut off at 13 min 50 sec. Isn't this quite a lot shorter than it should be? Also, the pack was HOT when I pulled it out of the plane.

Complicating things is that my charger, a Hobbico Quick Field Mk II, is apparently incapable of charging LiPolys all the way up (didn't know this when I bought it). At full charge, my pack produces 8.25 volts.

So do I have a defective pack? Do I need a different charger? What's going on?

Thanks,
Matt