Streamlight | SL-B9 Battery Pack

The SL‑B9 is Streamlight's compact rechargeable battery pack built specifically for its newer TLR‑7X, TLR‑7 HL‑X, and Sidewinder X‑series lights -⁠- a 3.6V, 850mAh lithium‑ion cell with an integrated USB‑C port that recharges fully in about 2.5 hours. An onboard safety control circuit protects the cell through real daily use, and it's rated for up to 500 recharge cycles, a genuine long‑term alternative to burning through disposable CR123A batteries in a light you actually run often. The exact factory‑spec rechargeable pack for the Streamlight lights engineered around it.