Nickel Metal Hydride (NiMH) batteries are your best bet when it comes to a durable battery that's going to last. Less sensitive than a Lipo battery and not susceptible to battery life memory loss like Nickel Cadmium battery packs; NiMH batteries offer the best of both worlds. Great for entry to mid-level players who just want to enjoy the game without having to worry about their batteries. The nunchuk configuration is specifically designed for use with crane stocks where each of the two battery sticks are inserted into separate crane stock tubes