Spare battery slightly larger than the original but also capacity, 150mA / H against 120mA / h old version. The battery is welded into the helicopter but does not necessarily require a soldering iron to be replaced, it quon didnt necessarily all on hand. Just cut the son drivers of used battery as long as possible, by twisting them with the son of the new, while taking care to respect polarities and disoler bare son with a small plastic tube taken from a pen Ball. The weight of the helicopter will be a surplus of a few milligrams, but it does not lempêchera to fly normally. We even get it to take off with a small Playmobil stuck under the belly.
