Seriously? AA batteries? Rather not. There are 2 CR 1616. But they are actually included or already built. And otherwise? The LED light is beautiful, the switch smoothly and also good to use with gloves. Open will not let the lamp unfortunately with a normal-sized screwdriver, apart from the coin-cell can be found in well and the assembly is quite easy. Conclusion: Anyone looking to attach a lightweight, easy to use LED light, makes the purchase of Gerber Zipper certainly nothing wrong.