★★★★★
Backup just in case
William G. Voit—October 18, 2025
Bought this as a backup in case I forget to charge the main battery. Size and quality are great. The flash light for it is amazing and long lasting. Read more
Streamlight
Streamlight 22111 SL-B50 Protected Lithium-Ion USB-C Rechargeable Battery with Integrated Charge Port 1-Pack
$32.08
About this item
- Protected Lithium-Ion rechargeable battery, 3.6V, 4900mAh, with on-board safety control circuit; rechargeable at least 500 times
- USB-C input charges from Streamlight AC/USB adapters and most other USB sources; battery charge status indicators around the port - red for charging, green for charged; charges in 6-hours using USB-C input
- Integrated safety circuit protects batteries from overcharge/over-discharge; additional safety features: pressure vent and integrated safety fuse
- Use the SL-B50 battery pack to power the ProTac 2.0, ProTac 2.0 Headlamp, and the ProTac 2.0 Rail Mount
- 2-year limited warranty
$32.08
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Product details
| Number of Batteries | 1 Lithium Ion batteries required. (included) |
|---|---|
| Brand | Streamlight |
| Battery Cell Composition | Lithium Ion |
| Battery Capacity | 4900 Milliamp Hours |
| Recommended Uses For Product | Fits select Streamlight flashlights that take SL-B50 battery packs |
Technical specifications
| manufacturer | Streamlight |
|---|---|
| part_number | 22111 |
| item_weight | 3 ounces |
| product_dimensions | 3.26 x 0.91 x 0.91 inches |
| item_model_number | 22111 |
| batteries | 1 Lithium Ion batteries required. (included) |
| size | 1-Pack |
| color | Silver |
| style | Classic |
| finish | Brushed |
| material | Steel |
| pattern | Solid |
| shape | Rectangular |
| power_source | Manual |
| voltage | 3.6 Volts |
| wattage | 4900 milliamp_hours |
| item_package_quantity | 1 |
| type_of_bulb | Led |
| special_features | Meets applicable United Kingdom and European Community Directives, USB-C input charges from Streamlight AC/USB adapters and most other USB sources |
| included_components | Lithium-Ion USB Rechargeable Battery 1-Pack |
| batteries_included | Yes |
| batteries_required | Yes |
| battery_cell_type | Lithium Ion |
| description_pile | Lithium Ion |
| battery_capacity | 4900 Milliamp Hours |
| warranty_description | Limited lifetime warranty. |
| best_sellers_rank | #68,966 in Health & Household ( See Top 100 in Health & Household ) #186 in AA Batteries |
| date_first_available | February 20, 2023 |
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Customer reviews
4.7147 ratings
Customers say
Customers find the battery holds a charge for a long time and has great quality.
★★★★★
Replacement battery
R. Arroyo—October 3, 2025
had to replace my older rechargeable battery, holds a charge for a long time and provides flashlight with enough power to give a very bright light. Read more
★★★★★
Its really nice to have a backup battery when it is cold.
Good Shots—December 26, 2024
Carry a backup. Batteries don't last as long when its cold outside. You can't find these just anywhere and should order them online before you need them. Really nice how easy it is to recharge either in an outlet or in a vehicle with a USB-C cord, or even with solar. Read more
★★★★★
Streamlight is perfect!
Brian Q.—December 12, 2025
Streamlight is a great brand and this battery is perfect for what I'll need it for and it's so easy to plug it in to charge. Read more
★★★★★
Good battery
Customer—December 5, 2024
This battery was bought to run a Streamlight flashlight. It was bought as a spare battery. It has been tested, both to charge it up and to run the flashlight. This battery has performed perfectly on every aspect of tests. Do I have any regrets on the purchase? Only one. It has a different connection than the other 18650 type batteries that have been purchased from Streamlight, but that may eventually be an improvement on battery design. Would I buy it again? Yes, and plans for additional purchase of this battery are being developed. Read more
★★★★★
Its Streamlight
Emmanuel Ross—November 5, 2024
I had been through many flashlight makes and models prior to finding Streamlight and now i have purchased about 15+ products for myself and my family as gifts. If its Streamlight it either works perfectly and far better than other brands or its defective and they give you a free replacement and maybe something additional pending on the issue. I feel this way about any Streamlight product. They have my unwavering faith and trust. I do lots of investigations in the dark. Climbing, running, hiding (use purple/red UV/infrared penlights to see without being seen) and have even had to use a flashlight to defend myself on multiple occasions. Streamlight has quite literally saved my life vs a refrigerator with legs (a big guy) with a blade. Thank you Streamlight!!! Read more
★★★★★
fast shipping and great service
Axeman—June 17, 2025
This is a good and well made product Read more
★★★★★
Streamlight Battery
Kevin E Kram—April 8, 2025
Great extra battery & holds a charge a long time. Read more
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