Streamlight SL-B26 18650 3.7V 2600mAh Rechargeable Lithium Battery

The Streamlight SL-B26 18650 rechargeable lithium battery is a smart alternative to disposable CR123 cells for modern Streamlight flashlights and tactical lights designed to accept both formats. Built around a 3.7V 2600mAh lithium-ion cell with integrated protection circuitry, the SL-B26 lets you eliminate the constant cost and waste of single-use batteries while maintaining reliable performance in the field, at the range, or on the job.

Charging is straightforward thanks to the built-in USB-C port and integrated LED status indicators that show charge progress. You can top up the battery in approximately 5 hours using any Streamlight USB power adapter or even a standard PC USB port—meaning you're never far from a power source when you need one. Whether you're running a weapon-mounted light, a handheld tactical torch, or a search-and-rescue fixture, having a spare SL-B26 charged and ready keeps your Streamlight gear operational without relying on disposables.

This battery is engineered as an OEM Streamlight component, so it's built to the same standards as the lights it powers. If you rotate between multiple Streamlight flashlights or keep backups on hand for extended operations, stocking one or more SL-B26 cells is a practical investment in reliability and long-term cost savings. The protected lithium-ion design handles repeated charge cycles, making it a durable cornerstone of any tactical or outdoor lighting setup.

Key Features

• 18650 lithium-ion cell: 3.7V nominal voltage, 2600mAh capacity
• Integrated protection circuitry for safe operation and longevity
• USB-C charging port for modern, reversible connectivity
• LED charge status indicators show real-time progress
• 5-hour recharge time from any Streamlight USB adapter or standard PC USB
• Compatible with Streamlight flashlights and tactical lights designed for both 18650 and CR123 formats
• Reusable: eliminates the need for disposable CR123 batteries

Specifications

Frequently Asked Questions

Which Streamlight flashlights work with the SL-B26?

The SL-B26 is compatible with Streamlight lights designed to accept both 18650 lithium-ion and CR123 battery formats. Check your specific flashlight's documentation or contact us to confirm compatibility with your model.

How long does the SL-B26 take to charge?

The battery recharges in approximately 5 hours when using any Streamlight USB power adapter or a standard PC USB port connected to the integrated USB-C charging port.

Can I use a regular USB power adapter to charge the SL-B26?

You can charge the battery using a Streamlight USB power adapter or any standard PC USB port. For optimal performance and safety, Streamlight USB adapters are recommended.

Is the SL-B26 better than disposable CR123 batteries?

The SL-B26 offers long-term cost savings and reduced waste compared to disposable CR123 cells. It's rechargeable, built with integrated protection circuitry, and works with Streamlight lights designed for either battery format, making it a practical choice for frequent users and field operations.