After reading the previous guide I thought I would try a cheaper option, I binned the battery and bought a hot one. Just the change of battery made a lot of difference to the performance and a flight time of 8 to 10 mins can be achieved. You will have to bin the battery tray and use velcro to hold the battery but this works fine, one little note: watch you don't over pitch the blades, whith the extra amps this little battery can chuck out you could cook the motor. If you do own one of these little heli's and are having trouble keeping it in the air, dont give up! try this. Flying one of these heli's when it's working right is very adictive and a good test for any RC heli flyer. However if you are not competant at flying RC heli's leave it on the shelf until you are. Hope this is of some help to someone.
Battery used: LRP VTEC 11.1V 480 mh 25c