Jrelecs&reg; No.5 Aa Battery Glow Plug Igniter Starter 7mm Glow Plug Nitro Engine for Rc Car - Purple No Need to charge, just use standard AA Batteries (batteries not included) An essential guide for anyone with RC car Used for RC helicopters, cars or boats A durable glow plug igniter Will fit all Models that use a Glow Plug that is 7mm (hex) in diameter from flat end to flat end.