Specifications: Size: AA Rechargeable Capacity: 2500 mAh Chemistry: Nickel Metal Hydride (NiMH) Voltage: 1.2V Brand: Duracell Included Qty: 4-Pack Features: No memory effect Reliable service life Long-Lasting Performance Recharges up to 400 times Saves you hundreds of dollars compared to Alkaline batteries Can be replaced in any product that uses AA Batteries These batteries come pre-charged and ready to use and are crafted using Long-Life Ion Core technology so you get amazing power in every battery.