NITECORE WLB40 USB-C RECHARGEABLE LI-ION BATTERY (4,000MAH)

A spare WLB40 battery for the NITECORE NWH20 work headlamp. 4,000mAh with a built-in USB-C port, so you charge it off the lamp and swap in a fresh pack with no downtime.

A CHARGED SPARE FOR YOUR NWH20, READY TO SWAP

The WLB40 is the battery that powers the NWH20 work headlamp. Keep a second one charged and you swap in fresh power in seconds instead of waiting on a cable, so a long shift never stops for a flat battery.

• 4,000mAh at 3.6V, 14.4Wh of capacity
• USB-C charging port built into the battery, no cradle or external charger needed
• Recharges in about four hours from a standard 5V/1A adapter
• Three blue indicators show the remaining charge at the press of a button
• 64 grams, 80.5mm long by 24mm across
• Designed for Nitecore work lights, including the NWH20

4,000mAh OF STEADY, LASTING POWER

Fourteen and a half watt-hours of capacity keeps a work headlamp running through the long, low and mid settings where most of a shift is spent.

In the NWH20 that is up to 12 hours at 300 lumens or 51 hours at the 40 lumen setting on a single pack. A stable output holds performance level rather than fading as the charge drops.

RECHARGE OVER USB-C, NO CRADLE TO CARRY

The USB-C port sits on the battery itself, so it charges from the same cable and adapter you already use for a phone.

A full charge takes about four hours from a 5V/1A adapter. The indicator by the port flashes blue while charging and turns steady blue once the pack is full, so you can see at a glance when it is ready.

KNOW THE CHARGE BEFORE YOU HEAD OUT

A short press of the indicator button lights the three blue LEDs to show how much is left, then they switch off after ten seconds.

Three steady lights mean 67 to 100 percent, two mean 34 to 66, and one means 11 to 33. A single flashing light means the pack is at 10 percent or below and due for a charge. It takes the guesswork out of which spare to grab.

SAFE AND RELIABLE

The WLB40 carries multiple global certifications, so it meets recognised safety standards for a Li-ion pack that rides on your head all day. It is built as a genuine Nitecore power solution rather than an unbranded cell, which is what you want in a battery that charges over USB-C and works in wet, dusty conditions.

MADE FOR NITECORE WORK LIGHTS

This is the dedicated pack for Nitecore work lighting, and the same battery that ships inside the NWH20 headlamp.

If you run the NWH20, a spare WLB40 means one charges while the other works. The pack is 80.5mm long and 24mm across with a fixed orientation, so before using it in another light, check that model's manual or battery compartment to confirm it takes the WLB40.

TECHNICAL SPECIFICATIONS

Model: NITECORE WLB40

Type: Rechargeable Li-ion battery

Capacity: 4,000mAh

Rated Energy: 14.4Wh

Nominal Voltage: 3.6V

Charging Port: USB-C (on the battery)

Charging Time: Approx. 4 hours (5V/1A adapter)

Charge Indicator: 3 blue LEDs (press to check); flashing while charging, steady when full

Length: 80.5mm ±0.3mm (3.17")

Diameter: 24mm ±0.3mm (0.94")

Weight: 64g / 2.26 oz

Safety: Multiple global certifications (CE and more)

Compatibility: Nitecore work lights, including the NWH20

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