Extension case for 18650 batteries to ensure an unlimited power supply.

The 18650 battery extension case connects directly to the flashlight and, using a rechargeable Li-ion 18650 battery, provides continuous energy.

Compatible with the NU43 and high-capacity 18650 battery, it allows users to meet the demands of a running event on trails of up to 100 kilometers.

• Mountain trail running
• Climbing
• Mountaineering
• Exploration

When the extension case is connected to one of the NITECORE NU40, NU43, NU50 flashlights or other compatible models, it will activate performance mode, ensuring more stable performance over time.

When the flashlight is turned on, it is powered first by the 18650 extension battery case while simultaneously charging the flashlight's built-in battery.

The 18650 battery extension case can function as a battery charger or a versatile power bank, ideal for charging various devices such as headlamps, handheld flashlights, smartphones, sports watches, and more.

Compatible with common 18650 lithium-ion batteries (flat-top batteries are excluded).

Four power indicator lights flash in red to ensure user safety during nighttime hours.

Energy level display:

• One indicator light steadily on indicates that the battery energy is approximately 25%
• Two indicator lights steadily on indicate that the battery energy is approximately 50%
• Three indicator lights steadily on indicate that the battery energy is approximately 75%
• Four indicator lights steadily on indicate that the battery energy is approximately 100%

Technical specifications:

• Input: 5V – 2A
• Output: 5V – 2A
• Battery options: All 18650 Li-ion batteries (flat-top batteries are excluded)
• Dimensions: 106mm x 40mm x 35mm
• Weight: 65g
• Accessories: Cable clip