Haven some trouble with the stock battery for my axe cp. Charged it the first time like the manual and it lasted for about 20 min. the second time not so good it only lasted a few min. now i haven't been in to RC stuff in a few years but from what i can remember the first time you charged a battery you had to let it charge for a few hours right?

My stock batt and charger took around 1.5 to 2 hours to charge; seemed like all day.
I've never gotten more than 4 to 5 mins of flight time.
If the first flight was just kinda hop'n around and sliding, shut down, reset heli in the middle of the pad, hop'n slide, shut down, reset, etc... I could see 15 mins or so. But at a constant hover, no more than 3 to 4 minutes is normal.