I threw the 4S 5000mAh battery on the DJI Naza F450 Flamewheel quad. I expected the battery might be a bit too heavy weighing in at 530gr plus the weight of the GoPro camera plus EagleTree Logger, EagleTree GPS and the DJI GPS, the Flamewheel has put on a bit of weight since it's maiden flight. I'll have to weigh all those parts and see what they contribute to the all up weight.
I was pleasantly surprised at the climb rate even with a half kilo battery onboard. The EagleTree log shows I flew for around 16 minutes of fairly sedate hovering with six ascents to high altitude.