Kastar 2 pack high capacity batteries. Use high quality Japanese cells for longer battery life with no memory effect. New smart LCD charge design, easy to carry. Input: 5V 2A; Output: 4.2V/8.4V 600mA. Intelligent LCD charger displays charging status and battery capacity. Can be powered by USB Wall & Auto Charger or a Computer, comes with a Micro USB cable. Patented charger with FCC, CE and ROHS certification. All items include 18-Month manufacturer warranty.