Rechargeable C Batteries: CITYORK 5500mWh usb rechargeable c batteries,widely compatible with household electronic devices,such as flashlights, emergency lights,electronic pianos, remote controls, radios, stereos, clocks, cameras, toys, smoke alarms USB Rechargeable C Battery: No charger or adapter required, quick and full charge in 3 hours with the 4-in-1 USB cable, just plug it into the USB port for easy charging LED Charging Indicator: LED indicator light easily monitors the charging status of your C batteries. The green light blinks when charging and stays green when fully charged, ensuring you know the status of your C-Battery at all times Intelligent protection system: built-in multiple circuit protection (overcharge, overcurrent, overvoltage, short circuit, high temperature), reliable quality Package and Service: 4 Pack USB Rechargeable C Cell Batteries,4-in-1 USB-C charging cable*1,battery cases*2.Buy with confidence,30 days refund or replacemrnt. 24 x 7 email support. If you have any questions, please contact us directly. 1.5V Constant Output Rechargeable 5500mWh C Cell Li-ion Batteries, 3H Fast Charging