This pack of four AA rechargeable batteries has a capacity of up to 1300 mAh, making them perfect for high drain devices. The batteries are pre-charged and have a voltage of 1.2 V. They are compatible with a range of devices and are ideal for use at home or on-the-go. The batteries are made with NiMH chemical composition and have a battery size of AA. They are manufactured in China and are compliant with California Prop 65 Warning. These batteries are suitable for a variety of applications, including but not limited to, consumer electronics.