Streamlight SL-B9 USB-C Rechargable Batteries - 2 Pack - Transform your multi-fuel, high-performance weapon lights into rechargeable systems with the SL-B9 protected lithium-ion battery pack with an integrated USB-C port. FEATURES: Protected lithium-ion rechargeable battery pack 3.6V, 850mAh with on-board safety control circuit, rechargeable up to 300 times; ; Integrated USB-C charge port; Charges in 2.5 hours; Charge status indicator built into the top of the battery Red: Charging // Green: Charged; ; Length: 1.36in; Weight: 0.7oz; Manufacturer Limited 2-Year Warranty;