Energizer Sliding AA / AAA NiMH Battery Charger CHDCWOB is perfect device to have when you don't have the room for a regular size battery charger in your camera bag and want battery power in just a few hours. The Energizer compact battery charger charges up to 4 AAA Nimh batteries and 4 AA Nimh batteries , 2 AA batteries and 2 AAA batteries simultaneously just in time to use your Digital Camera Binoculars, Digital Cameras, Digital Navigation, Flashlights, Laser Sights, Night Vision, and Red Dot Sights. In case you forget that the Energizer AA/AAA Charger is plugged in over an extended period of time, the Energizer CHDCWOB has a built in safety timer and temperature sensor that will prevent the rechargeable batteries from over heating and possibly leaking. Nimh batteries by Energizer are the most economical batteries to recycle making them better for the environment. they also do not contain highly toxic cadmium but are suitable replacements for Alkaline batteries in most devices. Please note that the CHDCWOB Energizer battery charger does not come with rechargeable batteries, however we do have the Energizer CHDCWB-4 Sliding charger packed with 4 AA rechargeable batteries. For a complete line of Sakar Ni MH batteries, please visit Sakar Rechargeable Batteries section.