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Streamlight SL-B50 USB Rechargeable Battery (1-Pack)$29.75
Availability: In Stock
The Streamlight SL-B50 rechargeable lithium-ion battery pack is a dedicated power source engineered for Streamlight's ProTac 2.0 flashlight lineup. If you rely on a ProTac 2.0 headlamp or rail-mounted light for tactical work, search and rescue, law enforcement, or field operations, this battery pack offers the convenient rechargeability and dependable runtime that keeps your light in the fight without swapping disposables.
Built around a 4900mAh lithium-ion cell, the SL-B50 is rated for at least 500 recharge cycles—meaning years of field use before capacity noticeably degrades. The integrated USB-C charging port eliminates the need for a separate cradle or proprietary charger; plug it into any USB-C power source and you're topped up in roughly 6 hours. Charge status is dead simple: a red indicator while charging, green when fully charged, so you'll never guess whether your light is ready to go.
Safety is built in. An integrated protection circuit guards against overcharge and overdischarge—common failure modes in rechargeable battery packs—so you can charge overnight or top up between shifts without babysitting the battery. At 3.26 inches and 3 ounces, the SL-B50 is compact enough to carry a spare without weighing you down, whether you're running a multi-day operation or rotating batteries through a kit.
| Capacity | 4900 mAh |
| Chemistry | Lithium-ion |
| Charge Port | USB-C |
| Charge Time | Approximately 6 hours |
| Recharge Cycles | At least 500 |
| Length | 3.26 inches (8.28 cm) |
| Weight | 3.0 ounces (85.0 g) |
| Warranty | 2-year limited warranty |
The SL-B50 is designed to power the ProTac 2.0 headlamp and the ProTac 2.0 rail-mounted light models. Check your light's manual or contact us if you're unsure about compatibility with your specific Streamlight tool.
Full charge takes approximately 6 hours using any USB-C power source—wall adapter, vehicle charger, portable power bank, or computer port.
The SL-B50 is rated for at least 500 recharge cycles before noticeable capacity loss, translating to years of regular field use.
Yes. An integrated LED indicator around the USB-C port glows red while charging and green when fully charged, making it easy to see at a glance whether your battery is ready to deploy.
SKU: 115647798 • Width: 4in • Height: 1.5in • Depth: 6.5in • Weight: 0.44oz
Availability: In Stock
The Streamlight SL-B50 rechargeable lithium-ion battery pack is a dedicated power source engineered for Streamlight's ProTac 2.0 flashlight lineup. If you rely on a ProTac 2.0 headlamp or rail-mounted light for tactical work, search and rescue, law enforcement, or field operations, this battery pack offers the convenient rechargeability and dependable runtime that keeps your light in the fight without swapping disposables.
Built around a 4900mAh lithium-ion cell, the SL-B50 is rated for at least 500 recharge cycles—meaning years of field use before capacity noticeably degrades. The integrated USB-C charging port eliminates the need for a separate cradle or proprietary charger; plug it into any USB-C power source and you're topped up in roughly 6 hours. Charge status is dead simple: a red indicator while charging, green when fully charged, so you'll never guess whether your light is ready to go.
Safety is built in. An integrated protection circuit guards against overcharge and overdischarge—common failure modes in rechargeable battery packs—so you can charge overnight or top up between shifts without babysitting the battery. At 3.26 inches and 3 ounces, the SL-B50 is compact enough to carry a spare without weighing you down, whether you're running a multi-day operation or rotating batteries through a kit.
| Capacity | 4900 mAh |
| Chemistry | Lithium-ion |
| Charge Port | USB-C |
| Charge Time | Approximately 6 hours |
| Recharge Cycles | At least 500 |
| Length | 3.26 inches (8.28 cm) |
| Weight | 3.0 ounces (85.0 g) |
| Warranty | 2-year limited warranty |
The SL-B50 is designed to power the ProTac 2.0 headlamp and the ProTac 2.0 rail-mounted light models. Check your light's manual or contact us if you're unsure about compatibility with your specific Streamlight tool.
Full charge takes approximately 6 hours using any USB-C power source—wall adapter, vehicle charger, portable power bank, or computer port.
The SL-B50 is rated for at least 500 recharge cycles before noticeable capacity loss, translating to years of regular field use.
Yes. An integrated LED indicator around the USB-C port glows red while charging and green when fully charged, making it easy to see at a glance whether your battery is ready to deploy.
SKU: 115647798 • Width: 4in • Height: 1.5in • Depth: 6.5in • Weight: 0.44oz