***DO NOT USE*** I purchased a $275 Red Bullet RC Speed Boat and within 2 charges of the battery - the battery smoked, swelled and was unusable. I placed a claim through warranty and after 6-7 various stalling questions such as please photograph where the batteries are fitted into the boat? Did you cycle the battery when not in use to maintain battery integrity etc etc etc... In the end I said I will buy a $30 battery elsewhere as your after sales service is disgusting. Darren