Rechargeable Li-ion Battery Pack 2×18650 3.7 V 5000 mAh — led lenser

The Rechargeable Li-ion Battery Pack 2×18650 3.7 V 5000 mAh from led lenser is a compact, replaceable power source composed of two 18650 lithium-ion cells. With a combined nominal voltage of 3.7 V and a total capacity of 5000 mAh, this pack is intended to power compatible LED Lenser flashlights, headlamps and other portable lighting devices that accept a 2×18650 configuration. The design focuses on providing a balance of runtime and size for outdoor activities, work tasks and everyday carry lighting needs.

Advantages

This battery pack offers rechargeable operation to reduce the need for disposable cells and lower operating cost over time. The use of two 18650 cells provides a high energy density relative to its size, enabling extended runtimes compared with single-cell solutions. The nominal voltage and capacity are suitable for many LED Lenser models and other devices designed for 2×18650 packs, delivering consistent output for flashlight and headlamp applications.

Suitable for

• Rechargeable replacement battery for compatible LED Lenser flashlights and headlamps
• Portable lighting for hiking, camping and outdoor activities
• Worksite illumination for tradespeople and technicians
• Everyday carry (EDC) flashlights and emergency lighting kits

When it may not be suitable

This battery pack is intended for devices that accept a 2×18650 lithium-ion configuration. It may not fit or function in equipment that requires different cell sizes, voltages, or a built-in battery pack. Devices with strict manufacturer requirements for original-brand cells or proprietary battery formats may require the original specified power source to ensure warranty compliance and correct operation.

Key specifications

• Cell type: Lithium-ion (18650)
• Configuration: 2×18650 cells in a combined pack
• Nominal voltage: 3.7 V (combined)
• Capacity: 5000 mAh (combined)
• Intended use: Rechargeable power for portable lighting devices

How to use

Install the battery pack into the compatible device following the device manufacturer’s instructions and polarity markings. Use an appropriate charger designed for 18650 lithium-ion cells or a charger recommended by the device maker; charge the pack fully before first use. Avoid forcing the pack into housings not designed for a 2×18650 assembly and ensure contacts are clean and dry before insertion. After charging, monitor device temperature during initial cycles to confirm normal operation.

What to consider before purchase

• Confirm your device accepts a 2×18650 rechargeable Li‑ion pack and matches the nominal voltage and physical dimensions.
• Check compatibility with the device manufacturer’s recommendations to avoid warranty or performance issues.
• Plan to use a charger compatible with 18650 lithium-ion cells and follow safe charging practices.

Usage recommendations

For safe, long-lasting performance, store the battery pack in a cool, dry place, avoid deep discharges, and charge before prolonged storage. Replace the pack if you notice swelling, leakage, excessive heat during charge/discharge, or a significant drop in runtime.