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L-shaped aluminium headlamp with quad LEDs magnetic tailcap pocket clip and headband

Nitecore

Nitecore HC35 2700 Lumen USB Rechargeable Headlamp 4000mAh 21700 Battery Included

SKU CH-ZEBG-XPE09

A 2700 lumen USB-rechargeable headlamp with a 4000 mAh 21700 battery that detaches for handheld or magnetic worklight use

  • TypeHead Lamp
  • 2700 lumens and 146 yards throw for powerful illumination
  • USB micro port charges the included 4000mAh 21700 battery directly
  • Quick-detach 90-degree bracket converts to handheld or magnetic worklight
  • Runs on 21700, 18650 or dual CR123 cells with supplied adapter
  • Up to 1200 hours runtime on a single charge

Nitecore HC35 2700 lumen headlamp

The Nitecore HC35 is a rechargeable L-shaped headlamp delivering 2700 lumens with a 146-yard beam throw. It includes a 4000mAh 21700 battery and accepts 18650, CR123 or RCR123 cells via the supplied adapter. A quick-detach bracket lets you rotate the light on the headband or remove it for handheld use.

Thermals noise and power

The unibody aluminium frame provides heat dissipation during extended high-output runs. The 4000mAh 21700 cell supports up to 1200 hours of operation on lower settings. A built-in micro USB port allows recharging without removing the battery, and an LED power indicator shows remaining charge.

Build integration and flexibility

The magnetic tailcap and removable pocket clip enable hands-free mounting on metal surfaces or pocket carry. The 90-degree head angle works naturally as a worklight when detached from the included elastic headband. Supplied accessories include a spare O-ring, lanyard, bracket, adapter sleeve and USB cable. No other power source or mount is required.

Highlights

  • 2700 lumens and 146 yards throw for powerful illumination
  • USB micro port charges the included 4000mAh 21700 battery directly
  • Quick-detach 90-degree bracket converts to handheld or magnetic worklight
  • Runs on 21700, 18650 or dual CR123 cells with supplied adapter
  • Up to 1200 hours runtime on a single charge

Specifications

Part NumberHC35
TypeHead Lamp

Questions about this item

How do I install the NL2140HP 4000mAh 21700 battery and what step do people often miss?

Insert the battery with the positive end toward the head, then fully tighten the tailcap to complete the circuit; the step users skip is seating the spare O-ring so the seal stays water-resistant.

What maintenance or replacement will the HC35 need after extended use?

The 21700 cell will eventually hold less charge — replace it with another >8A 21700 or 18650; also inspect the headband elastic and pocket clip for wear and swap the spare O-ring if it cracks.

What limit appears first during sustained high-output use?

Thermal regulation kicks in as the unibody aluminium frame dissipates heat; the quad LEDs will step down from the 2700 lumen peak to protect the 21700 battery and maintain safe operating temperature.

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