Includes 4 AA, 4 AAA rechargeable batteries, and compatible TN477U battery charger aa aaa Long lasting 1.2V rechargeable batteries; rechargeable aa batteries have 2500mAh capacity and rechargeable aaa batteries have 1000mAh Tenergy's AA and AAA rechargeable batteries are standard size and can be easily switched with any single-use AA battery or AAA battery TN477U aa aaa battery charger is compatible with both AA and AAA rechargeable NiMH batteries Fast charger is powered by a micro USB port, and can be recharged without an AC outlet Certified by FCC, CE, CEC and includes built-in protections against overcharging, short-circuits, and reverse polarity. Charger includes Tenergy’s 12 months manufacturer warranty Tenergy's TN477U fast charger bundle with 4 AA rechargeable batteries and 4 AAA rechargeable batteries, includes everything a beginner needs to switch over from single use batteries to rechargeable. Rechargeable NiMH batteries are the ideal capacity for everyday home electronics. The bundled charger is intuitive and uses LED lights to signal when the batteries are fully recharged.