Nitecore NL1840 High-performance 4000mAh Li-ion 18650 rechargeable battery

Power your gear with confidence using the Nitecore NL1840, the first 18650 rechargeable Li-ion battery to offer a 4000mAh capacity. Designed for performance and safety, the NL1840 is ideal for outdoor enthusiasts, professionals, and anyone relying on powerful, long-lasting energy for their devices.

Its integrated safety features include a pressure relief valve, internal protective circuitry, and nickel-plated stainless steel ends for added durability. Environmentally conscious and compatible with a range of Nitecore chargers, the NL1840 is both practical and sustainable.

Key Features:

• 4000mAh Capacity – Extended runtime for power-hungry gear
• Built-In Protection – Prevents overcharge, over-discharge, and short-circuit
• Pressure Relief Valve – Activates during rapid temperature rise for added safety
• Durable Exterior – Metallic film and reinforced ends resist abrasion and impact
• Environmentally Friendly – Rechargeable, cadmium-free, lead-free, and mercury-free
• Water Resistant – IPX6 rating for reliable use in wet conditions
• Charger Compatibility – Works with Nitecore UMS4, UMS2, Ci4, and Ci2

Specifications:

• Battery Type: 18650 Li-ion
• Voltage: 3.6V
• Capacity: 4000mAh
• Energy: 14.4Wh
• Continuous Discharge Current: 5A
• Length: 69.8mm
• Diameter: 18.6mm
• Weight: 50g
• IP Rating: IPX6

Ideal For:

• Flashlights and headlamps
• Emergency kits
• Outdoor and tactical gear
• Daily-use electronics