Nitecore® THUMB USB Rechargeable Light

MSRP: $23.99
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  • 120˚ tilting head – aim the light
  • Dual output – white & red LEDs
  • 85 lumens, runtime up to 22 hours
  • 3 brightness levels
  • Clip attaches to hats, packs, pockets, shirts, and belts
  • Built-in, Li-ion micro-USB rechargeable battery
  • Recharge with a power bank battery


Nitecore® THUMB is a USB rechargeable light with a tilting head to aim the light where needed. It has three brightness levels plus a flashing mode with up to 85 lumen output and runtime of 22 hours on low. Auxiliary red LEDs can help preserve night vision, useful during star gazing and night photography. It’s small and light, just 0.88 oz (24.9 g). And to recharge, simply plug into a power bank.

A metal multi-purpose clip allows you to attach THUMB to your hat bill then tilt the light for headlamp-like performance. Clip it to your pack strap and aim the light forward for night hiking. Clip to your shirt or belt to free both hands while doing camp chores. And, of course, clip in your pocket to keep from losing it.

thumb-hat-bill.jpg   thumb-backpack-strap.jpg   thumb-pants-clip.jpg


THUMB has two buttonsthe upper button controls the white LEDs and the lower button controls the red LEDs – very simple. Pressing the upper button turns on the white LEDs in high mode. Repeatedly press the upper button within 3 sec to cycle from high>medium>low>flashing>off. After 3 sec, pressing the upper button turns the white light off. Pressing the lower button turns on the red LEDs. Repeatedly press the lower button within 3 sec to cycle from constant red>flashing red>off. After 3 sec, pressing the lower button turns the red light off.

To prevent the light from turning on in your pocket or pack, with the light off, hold down both buttons simultaneously. THUMB will lockout, signaled by a red flash. To unlock, hold down both buttons simultaneously again. Another red flash signals unlocking.

LED Mode Output (lumens) Turn On Turn Off
White High 85 Press Upper Button Once After 3 sec, Press Upper Button
Medium 30 Press Upper Button Twice After 3 sec, Press Upper Button
Low 2 Press Upper Button 3 Times After 3 sec, Press Upper Button
Flashing 85 Press Upper Button 4 Times After 3 sec, Press Upper Button
Red Constant - Press Lower Button Once After 3 sec, Press Lower Button
Flashing - Press Lower Button Twice After 3 sec, Press Lower Button


THUMB has a built-in, high-efficiency Li-ion rechargeable battery with an intelligent protective charging circuit and a Micro USB connection. Since you probably already carry a spare battery to charge your phone, there’s no need to worry about running out of juice or replacing batteries, just plug into a power bank, wall charger, computer, or car (USB cable not provided). The light maintains full functionality while charging. An indicator light lets you know when the charge is complete. A rubber cover protects the USB port from dirt and moisture.

Charging State Indicator Light
Charging Steady Red
Charging Complete Steady Green


THUMB has an integrated, stainless steel ring for mounting. So strong it supports up to 77 lb (35 kg) of weight. Two split rings are included (small and large) for mounting a lanyard, connecting a micro carabiner, or attaching to a keychain.



Mode Output (lumens) Runtime (hours)
Low 2 22
Medium 30 2.25
High 85 0.75


LED: 2x high-performance LEDs

LED Color Temperature: Cool white

Battery: Built-in rechargeable Li-ion, 220 mAh

Lighting Modes

   White: High/Medium/Low/Flashing

   Red: Constant/Flashing

Beam Distance: 85 ft (26 m)

Beam Pattern: Wide-angle flood

Peak Beam Intensity: 170 cd

Body: Polycarbonate, impact resistant

Tilt: 120˚

Switch: 2x side power/mode buttons, rubber

Charging Connection: Micro USB (USB cable not provided)

Charging Time: 3 hours

Dimensions (LxWxH): 2.91 x 0.94 x 0.62 in. (74 x 24 x 15.8 mm)

Lanyard Slot (WxL): 0.15 x 0.56 in. (3.7 x 14.3 mm)


   Light: 0.88 oz (24.9 g) with built-in battery

   Small Split Ring: 0.01oz (0.3 g)

   Large Split Ring: 0.06 oz (1.8 g)

Impact Resistance: 4.9 ft (1.5 m)

Ingress Protection Rating: IP65, dust protected and water resistant


   1x Light with integrated USB rechargeable Li-ion battery

   1x Small split ring, ø0.41 in. (10.4 mm) ID

   1x Large split ring, ø0.62 in. (15.7 mm) ID


User Manual

Nitecore THUMB User Manual



  • Very bright light, to avoid eye injuries, DO NOT stare directly into the light and DO NOT shine the light directly into the eyes of others.
  • Keep away from children to avoid injury.
  • DO NOT use if battery is damaged to avoid fire or explosion.
  • Charge in or on a fire-proof surface to avoid possible injury. DO NOT charge unattended.
  • Charge only at temperatures between 32-113°F (0-45°C) to avoid permanent damage and possible fire or explosion during charging.
  • Recycle or dispose of properly according to local regulations at end of life, DO NOT dispose in fire or incinerator as battery may catch fire and explode.

In no event shall Litesmith, LLC be liable for any direct, indirect, punitive, incidental, or special consequential damages, to property or life, whatsoever arising out of or connected with the use or misuse of its products.