NU21 Headlamp (Yellow) - Ultra-light Rechargeable
360-Lumen Ultra-Light Rechargeable Headlamp for Outdoor Use
The NITECORE NU21 is an ultra-lightweight rechargeable headlamp built for reliable hands-free lighting in outdoor and emergency scenarios. With a 360-lumen maximum output and dual light modes, it supports both general illumination and low-visibility operations.
Its compact form factor and integrated battery system make it easy to carry and wear for extended periods, while USB-C charging provides efficient power replenishment in the field.
A compact, lightweight headlamp designed to provide reliable illumination for outdoor, travel, and emergency use.
"A prudent person foresees danger ahead and takes precautions. The simpleton goes blindly on and suffers the consequences. - Proverbs 27:12"
360-Lumen Output
Provides effective illumination for navigation and task lighting
Dual Light Modes
White light for general use and red light for night vision preservation
USB-C Rechargeable System
Integrated battery supports fast charging without disposable cells
Ultra-Lightweight Design
Weighs just 1.55 oz for minimal fatigue during extended use
Glow-in-the-Dark Headband
Improves visibility in low-light environments
Lockout Function
Prevents accidental activation during transport
Weather-Resistant Build
IP66 rating protects against dust and heavy rain
The numbers, flat and honest.
| Max Output | 360 lumens |
|---|---|
| Beam Distance | 58 m |
| Peak Intensity | 840 cd |
| Battery | Built-in 500mAh Li-ion |
| Recharge | USB-C (~1.5 hours) |
| Runtime | Up to 37 hours |
| Weight | 1.55 oz (44 g) |
| Modes | White light, red light |
| Water Rating | IP66 |
| Impact Resistance | 1 meter |
| Peak Beam Intensity | 840 cd |
| Recharge Time | Approx. 1.5 hours (USB-C) |
| Dimensions | 2.37 in × 1.30 in × 1.00 in |
| Water Resistance | IP66 |
WHY YOU’RE BUYING FROM STAY READY.
We aren’t the Amazon of survival. We’re a small, opinionated shop that carries gear we’d stake our own lives on — and we back every piece with real support.
Curated
Every brand we carry has been vetted in the field by our team. If it doesn’t pass our 30-day use test, we don’t stock it.
Authenticated
Factory-direct from authorized dealers. No grey-market, no refurb, no knockoffs. Your warranty is real.
Supported
Real humans on phone, text, and email — seven days a week. We carry this gear ourselves and we stand behind it.
American
HQ in California. Orders ship from our US warehouse. US-based customer care.
HIGH-PERFORMANCE LED LIGHTING
Tactical LED lighting and power gear, engineered in Guangzhou since 2007.
Nitecore was founded in 2007 in Guangzhou, China — a team of engineers focused on serious LED lighting for professionals and outdoor users. Their lineup spans tactical flashlights, headlamps, EDC lights, batteries and chargers, USB-C rechargeable cells, and even portable fans and mosquito protection. Nitecore's flashlights are a fixture in EDC, hunting, search-and-rescue, and military kits worldwide, with a reputation for pushing high lumens, intelligent driver electronics, and runtime-optimized battery systems.
- Founded in 2007 in Guangzhou, China
- Tactical flashlights, headlamps, batteries, chargers
- USB-C rechargeable lithium-ion power solutions
- Engineered for EDC, hunting, SAR, and military use
- Known for high-output LED engineering
Answers, straight up.
Product-specific questions on the left. Shopping with SRO on the right. Both open-ended — hit us if we missed one.
How long does shipping take?
Most orders process within 1–3 business days from our warehouse. From there: 5–7 business days economy, 2–3 business days expedited, or overnight if you need it fast. Free economy shipping on orders over $150 (contiguous US). Alaska, Hawaii, and Pro Eagle / freight items are quoted at checkout. You’ll get a tracking number and link the moment your order ships.
What’s your return policy?
30 days from the day your order arrives. Gear has to come back unused, with all original tags, stickers, and packaging intact. For standard items we’ll send a prepaid return label and deduct return shipping from your refund. Oversized or freight returns are on you, unless the item showed up damaged, defective, or wrong — in which case we cover it.
Refunds hit your original payment method within 10 business days of approval.
What can’t I return?
Final-sale items, gift cards, food and drink products, personal-care items, anything customized or engraved, briefs (hygiene), and hazardous materials. If you’re not sure whether something qualifies, email us before you order — we’ll tell you straight.
Do you ship outside the contiguous US?
Yes. Alaska, Hawaii, and US territories ship on freight-quoted rates calculated after checkout. International orders are available worldwide at variable rates; duties and import fees are the customer’s responsibility. EU customers get a 14-day cancellation window per EU consumer law, on top of our standard return policy.
My package arrived damaged — what now?
Email info@stayreadyoutdoors.com within 7 days of delivery with your order number and clear photos of the damage (product + packaging). We’ll replace, refund, or ship a return label on us — no back-and-forth. Damaged, defective, or wrong-item claims never cost you shipping.
Can I talk to a human before buying?
Yes. Email info@stayreadyoutdoors.com — we answer every message ourselves, usually within a few hours during business days. We carry this gear, we use this gear, and we’d rather talk you out of a kit that doesn’t fit your mission than sell you the wrong one.
Do you offer a military/first-responder discount?
Yes. Active-duty and veteran military, police, fire, EMS, and medical first responders get 10% off every order. Verify through GovX at checkout — one-time, secure, and reusable across thousands of brands. Discount applies automatically once you’re verified.