Just had a solid 9 minute flight.
Owner's booklet says only 6-7 minutes.
I also put a small black dot on the USB connector which plugs into the heli,
so I don't have to constantly examine the connector to see which side should be facing up.
Photographic record of said flight:
(notice grounded Msr on top of right studio monitor

)
Still having to adjust to yaw control in right stick.
It's only a 3 channel/cost $27 from Amazon/Xheli, but hovers better than my Msr and Mcx.