The Vertical Battery Grip with Two Li-ion Batteries from Neewer can double your shooting time and holds either one or two NP-FZ100 lithium batteries. Made from metal and rubber, the grip has a 1/4" screw thread on the bottom so you can attach it to your tripod. Two NP-FZ100 lithium batteries are included and each one has a premium cell for longer life without memory effect. An integrated chip in the batteries prevents overcharging and overheating, and provides short circuit protection to prevent damage to internal electronics.