The Streamlight SL-B26 protected Li-Ion USB rechargeable battery pack with integrated microUSB charge port is an economical alternative to disposable CR123 cells for the latest Streamlight flashlights that are designed to accept both. The integrated USB charge port with LED status lights can recharge the battery in 5 hours. Input power source can be any Streamlight USB power adapter or a PC USB port.
Streamlight SL-B26, USB Rechargeable Battery, 2-Pack, Clam Pack, 18650 Type 22102
