--- product_id: 642727191 title: "Streamlight 20237 SL-B9 Protected Li-Ion USB-C Rechargeable Battery, 2-Pack" brand: "streamlight" price: "213 zł" currency: PLN in_stock: true reviews_count: 9 category: "Streamlight" url: https://www.desertcart.pl/products/642727191-streamlight-20237-sl-b9-protected-li-ion-usb-c-rechargeable store_origin: PL region: Poland --- # USB-C fast recharge (6 hrs) 850mAh Li-Ion power Streamlight-grade durability Streamlight 20237 SL-B9 Protected Li-Ion USB-C Rechargeable Battery, 2-Pack **Brand:** streamlight **Price:** 213 zł **Availability:** ✅ In Stock ## Summary > 🔦 Power your mission with Streamlight’s unstoppable rechargeable energy! ## Quick Answers - **What is this?** Streamlight 20237 SL-B9 Protected Li-Ion USB-C Rechargeable Battery, 2-Pack by streamlight - **How much does it cost?** 213 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/642727191-streamlight-20237-sl-b9-protected-li-ion-usb-c-rechargeable) ## Best For - streamlight enthusiasts ## Why This Product - Trusted streamlight brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Fast USB-C Recharge:** Cut downtime with a quick 6-hour USB-C recharge cycle—charge smarter, not longer (charger sold separately). - • **Seamless Compatibility:** Specifically designed for select Streamlight weapon-mounted lights and optics, ensuring a secure fit and optimal performance. - • **Charge Status at a Glance:** Integrated LED indicator shows red while charging and green when fully charged—never guess your battery life again. - • **Endless Power, Zero Waste:** Rechargeable lithium-ion cells deliver consistent 850mAh capacity, keeping your gear mission-ready without disposable battery waste. - • **Built for the Toughest Missions:** Engineered to Streamlight’s professional-grade standards, these batteries withstand the harshest environments and demanding use. ## Overview The Streamlight 20237 SL-B9 is a 2-pack of rechargeable 850mAh lithium-ion batteries designed for select Streamlight weapon-mounted lights. Featuring fast USB-C charging with a built-in LED status indicator, these batteries offer reliable, consistent power output and professional-grade durability trusted by law enforcement and tactical users worldwide. ## Description Meet the Streamlight SL-B9 Rechargeable Battery Pack, the smarter, more reliable way to power your everyday Streamlight flashlight. Designed by the brand trusted by law enforcement, tradesmen, industrial crews, and everyday users worldwide, the SL-B9 gives you dependable runtime without the hassle, waste, or cost of constantly replacing disposable batteries. Instead of wondering whether your light will fail when you need it most, the SL-B9 keeps your flashlight mission-ready. Recharge it, drop it in, and go whether you’re stepping into a dark basement, responding to a call, navigating a jobsite, or simply walking the dog after sunset. The rechargeable design helps reduce battery waste while delivering Streamlight-level performance you can trust day after day. Streamlight engineered the SL-B9 battery pack for consistent output, long-lasting durability, and reliable performance in demanding environments. It’s purpose-built for compatible Streamlight models, ensuring secure fit, optimal power delivery, and the confidence that your light will work when it matters most. If you rely on your flashlight at work or at home the SL-B9 makes it easier, greener, and more economical to stay prepared. Stay powered. Stay ready. Choose genuine Streamlight. Review: Worth trying out, charges quickly and used a USB-C cable. - Great rechargeable battery for Streamlight Vantage II headlamp. Operators say longevity is same as non rechargeable but it always depends on usage, how long and in what capacity. Charges quickly with USB-C charger. Operators say the difference between this and non rechargeable is that this one just stops working when it needs charged. The non rechargeable will dim before its ready to be replaced. Quality seems good like most Streamlight products. Unsure on value, it depends on how many months/years before it won't charge enough to be able to use. Review: Works great recharge with ease - Awesome batteries. They work great and also fit in some red dot optics ## Features - Compatibility and Purpose: Fits select Streamlight weapon mounted lights; verifty compatibility before purchase; the SL-B9 rechargeable lithium-ion battery pack delivers consistent power output and dependable performance for duty-grade illumination tools - Reliable Performance & Runtime: Engineered for optimized runtimes and sustained brightness output, the SL-B9 ensures your light maintains peak intensity throughout the charge cycle ideal for law enforcement, security, military, and EDC users - USB-C Rechargeable Convenience: Skip disposable batteries and reduce downtime, the SL-B9 battery pack recharges with 6 hours using USB-C (charger sold separately), built-in charge indicator that displays red when charging and green when charged - What’s Included from Streamlight: Includes two (2) Streamlight SL-B9 rechargeable lithium-ion batteries - Built Streamlight Tough: Built to Streamlight’s proven professional-grade standards for durability, reliability, and field performance trusted worldwide by first responders, tactical professionals, and demanding users ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D7VKJX8Y | | Antenna Location | Streamlight Weapon Lights | | Battery Capacity | 850 Milliamp Hours | | Battery Cell Type | Lithium Ion | | Battery Weight | 19.81 Grams | | Best Sellers Rank | #15,764 in Health & Household ( See Top 100 in Health & Household ) #274 in Household Batteries | | Brand | Streamlight | | Built-In Media | (2) SL-B9 battery packs | | Customer Reviews | 4.8 4.8 out of 5 stars (644) | | Global Trade Identification Number | 00080926202375 | | Item Dimensions | 1.36 x 0.67 x 0.67 inches | | Item Type Name | Holster | | Item Weight | 20 Grams | | Manufacturer | Streamlight | | Model Name | SL-B9 | | Model Number | 20237 | | Number of Batteries | 2 C batteries required. (included) | | Reusability | Rechargeable | | UPC | 080926202375 | | Unit Count | 1.0 Count | | Voltage | 3.6 Volts | | Warranty Description | Two Year Limited Warranty | ## Product Details - **Battery Capacity:** 850 Milliamp Hours - **Battery Cell Composition:** Lithium Ion - **Brand:** Streamlight - **Number of Batteries:** 2 C batteries required. (included) - **Recommended Uses For Product:** Streamlight Weapon Lights ## Images ![Streamlight 20237 SL-B9 Protected Li-Ion USB-C Rechargeable Battery, 2-Pack - Image 1](https://m.media-amazon.com/images/I/617xldVBl0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worth trying out, charges quickly and used a USB-C cable. *by T***I on July 23, 2025* Great rechargeable battery for Streamlight Vantage II headlamp. Operators say longevity is same as non rechargeable but it always depends on usage, how long and in what capacity. Charges quickly with USB-C charger. Operators say the difference between this and non rechargeable is that this one just stops working when it needs charged. The non rechargeable will dim before its ready to be replaced. Quality seems good like most Streamlight products. Unsure on value, it depends on how many months/years before it won't charge enough to be able to use. ### ⭐⭐⭐⭐⭐ Works great recharge with ease *by L***D on February 11, 2026* Awesome batteries. They work great and also fit in some red dot optics ### ⭐⭐⭐⭐⭐ Great for my PolyTac *by A***R on February 1, 2026* I don’t know why I waited so long to order these. I have purchased countless disposable 20237 batteries over the years for my lights. After they are drained I then have to take them to a battery recycling station as throwing these in the trash is not safe. These are awesome and easily recharged. Keep them in all my Streamlight PolyTac flashlights. ## Frequently Bought Together - Streamlight SL-B9 Rechargeable Battery 850mAh, 2-Pack, 20237 - Streamlight 69458 TLR-7 HL-X USB 1000-Lumen Rechargeable Rail Mounted Weapon Light, Includes Interchangeable High and Low Switches, Black - Streamlight 69424 TLR-7 X 500-Lumen Compact Tactical Weapon Light, Includes High, Low Paddle Switches and Key Kit, Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/642727191-streamlight-20237-sl-b9-protected-li-ion-usb-c-rechargeable](https://www.desertcart.pl/products/642727191-streamlight-20237-sl-b9-protected-li-ion-usb-c-rechargeable) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-23*