Streamlight SL-B2 Rechargeable Battery Features The Streamlight SL-B2 Rechargeable Battery uses a lithium-ion chemistry engineered for consistent output across the life of the cell which keeps the TLR-6 HL s beam intensity steady rather than fading early in a charge cycle. Sized specifically for the TLR-6 HL series the SL-B2 drops straight into the light with no modification or adapter needed. The 3.2-volt nominal rating matches the light s power requirements precisely so performance stays within the factory specification. Supplied as a matched pair the two batteries let an owner keep one charged and ready while the other is in use. Streamlight designed the SL-B2 to pair with its own USB-C charging case which stores and charges two batteries at once and includes charge indicators so the status of each cell is visible at a glance. That system turns a quick top-off into a normal part of cleaning and maintenance rather than a separate chore. At only about 0.26 ounces per battery the pair adds negligible bulk to a range bag or duty kit. For anyone running a TLR-6 HL light on a carry or home-defense pistol the SL-B2 2-pack is the straightforward way to keep a reliable spare on hand. Streamlight SL-B2 Rechargeable Battery Specifications Manufacturer: Streamlight Model: SL-B2 Rechargeable Battery Type: Rechargeable Lithium-Ion Color: Silver / Black Quantity: 2-Pack Nominal Voltage: 3.2 Volts Length: 0.83 Diameter: 0.57 Weight: 0.26 oz Compatible Hosts: TLR-6 HL Gun Light Available At: GrabAGun