---
product_id: 642727191
title: "20237 SL-B9 Protected Li-Ion USB-C Rechargeable Battery, 2-Pack"
brand: "streamlight"
price: "€ 54.96"
currency: EUR
in_stock: true
reviews_count: 9
category: "Streamlight"
url: https://www.desertcart.com.cy/products/642727191-20237-sl-b9-protected-li-ion-usb-c-rechargeable-battery
store_origin: CY
region: Cyprus
---

# 6-hour USB-C recharge 2-pack Li-Ion power Streamlight-grade durability 20237 SL-B9 Protected Li-Ion USB-C Rechargeable Battery, 2-Pack

**Brand:** streamlight
**Price:** € 54.96
**Availability:** ✅ In Stock

## Summary

> 🔦 Power your mission with Streamlight’s unstoppable rechargeable duo!

## Quick Answers

- **What is this?** 20237 SL-B9 Protected Li-Ion USB-C Rechargeable Battery, 2-Pack by streamlight
- **How much does it cost?** € 54.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/642727191-20237-sl-b9-protected-li-ion-usb-c-rechargeable-battery)

## 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

- • **Dual Power Boost:** Two SL-B9 rechargeable batteries for uninterrupted mission-ready lighting.
- • **Rapid USB-C Recharge:** Fully recharge in just 6 hours with universal USB-C convenience (charger sold separately).
- • **Consistent Peak Brightness:** Engineered to maintain steady, bright output throughout the entire charge cycle.
- • **Eco-Friendly & Cost-Saving:** Say goodbye to disposable batteries and reduce waste while staying powered up.
- • **Built for the Toughest Demands:** Professional-grade durability trusted by law enforcement and tactical pros worldwide.

## Overview

The Streamlight 20237 SL-B9 is a 2-pack of rechargeable lithium-ion batteries designed specifically for select Streamlight weapon-mounted lights. Featuring rapid 6-hour USB-C charging, consistent brightness output, and rugged durability, these batteries deliver reliable, eco-friendly power trusted by professionals in law enforcement, security, and tactical fields. Each pack includes two batteries built to Streamlight’s high standards, ensuring your flashlight stays mission-ready with less downtime and waste.

## 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 very well - Great invention perfect

## 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 |
| Best Sellers Rank | #20,992 in Health & Household ( See Top 100 in Health & Household ) #346 in Household Batteries |
| Brand Name | Streamlight |
| Color | Black |
| Customer Reviews | 4.8 4.8 out of 5 stars (605) |
| Date First Available | June 24, 2024 |
| Hand Orientation | S |
| Included Components | (2) SL-B9 battery packs |
| Item Dimensions LxWxH | 1.36 x 0.67 x 0.67 inches |
| Item Package Dimensions L x W x H | 4.53 x 3.43 x 0.63 inches |
| Item Weight | 20 Grams |
| Manufacturer | Streamlight |
| Material | Plastic |
| Model Name | SL-B9 |
| Number of Items | 2 |
| Package Weight | 0.04 Kilograms |
| Part Number | 20237 |
| Size | One Size |
| Style | Classic |
| Suggested Users | mens |
| 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

![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 very well
*by P***I on February 9, 2026*

Great invention perfect

### ⭐⭐⭐⭐⭐ Great for my PolyTac
*by T***5 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

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**Shop now:** [https://www.desertcart.com.cy/products/642727191-20237-sl-b9-protected-li-ion-usb-c-rechargeable-battery](https://www.desertcart.com.cy/products/642727191-20237-sl-b9-protected-li-ion-usb-c-rechargeable-battery)

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-07*