Specification: Material Ni-zn Battery voltage 1.5 V Charging voltage DC 5 V Charging method USBCharging time 3-5 hours Weight 20g
Features: High-quality Ni-Zn material. The red LED is on during charging, & the blue LED is on when fully charged. Can be used instead of alkaline dry batteries.USB charging. Package included: 4 x Battery 1 x USB (Universal Serial Bus) cable