Originally Posted by Donaldsneffe
Well, I got nearly 6 min hovering with the stock battery and 5 1/2 with the HK (tested only one).
The Thunder Power is something about 8 US$ - I guess, best batteries will be the cheap HK replacements.
Wont pay 5 times the price for 1 minute. All my small batteries fade away after some time...
With 120 mAh HK replacement the heli is a little less tail heavy... of course shorter flight time - but who cares changing batteries if it is as easy as in the Nine Eagles helis. They are so cheap, I guess, everybody can afford 10 or 20...
I'll stick with the HK 150s for now as well. They offer good performance, especially for the money. I can get 4 or so shipped for the same money as a single Thunder Power. And if the HK150s live as long as the 120s, that should also not pose a problem. Only thing I find a little annoying about them is that the connector is not a perfect fit, it takes more strength to push them in and out again. A little work on the connector with a file helps to cure this, but it would be nicer if that wasn't needed at all.