Nitecore NU20 Review

Overview

The NU20 is the update ultralight hikers spent years asking Nitecore for. It keeps the size, shape and two-button logic of the 2017 original, which weighed 54 g and charged over micro-USB. The Classic version drops to 38 g, adds USB-C and costs around $25. The trade-off is a small 500 mAh cell and a Turbo mode that doesn’t last. This is a camp-and-tent light that also handles a pre-dawn start, not a lamp for long night miles.

Key Specs

Spec	Value
Weight	38–47 g depending on version
Max output	360 lumens (Turbo)
Max beam distance	109 m
Max beam intensity	2,963 cd
Runtime	97 h at 1 lumen; about 5 h at 200 lumens; about 2 h rated at 360 lumens
LED	NiteLab UHE LED
Beam colors	Primary white (6,000K), high-CRI auxiliary white (CRI 90+, 4,500K), red
Special modes	SOS, Location Beacon, Slow Flashing (red)
Battery	Built-in 500 mAh Li-ion, not replaceable
Charging	USB-C, just over 1 hour; usable while charging
IP rating	IP66
Impact resistance	1 m
Dimensions	52.1 × 33.1 × 24.4 mm
Price	About $25

Performance

Weight. Weight is the reason to buy it. At 38 g in Classic trim, the lamp and bracket account for roughly 28 g and the stock dual shock-cord headband for about 10 g. Gram-counters can swap in Litesmith’s Spiderlite UL headband, which brings the Classic to about 32 g. The original NU20 weighed 54 g, so the redesign takes roughly half an ounce off.

Output and beam. The lamp throws a wide, flood-leaning beam and tilts down for reading and close work. Turbo’s 360 lumens is generous for the size, but it doesn’t last. Thermal regulation steps output down, and reviewers measured roughly 30 minutes at full brightness before it settles near 200 lumens. That is fine for a trail junction or a camp chore. It is a poor match for hours of night hiking, where the 200-lumen High mode (about 5 hours) is the working setting.

Three light sources. A primary white LED handles general use. A separate high-CRI auxiliary white gives softer, truer color for map reading and gear sorting. A red LED has Low, High and Slow Flashing modes to protect night vision. The white modes bottom out at 1 lumen, which is enough to find a headlamp-sized item in a tent without waking a tent-mate. Nitecore restored that floor after owners complained when the NU25 update dropped it.

Controls. Two buttons split the work: power for white, R for red. A single press cycles through intensities, and a long press jumps to Turbo. The logic is quick to learn and works with gloves on. SOS and Beacon take a more involved sequence that is easy to forget, though few hikers will ever need it. Pressing both buttons locks the lamp so it can’t drain in a pack. There is no mode memory, so every power-on starts from Low, which suits tent use and annoys anyone who wants to resume at High.

Battery and charging. A full charge takes just over an hour over USB-C, and the lamp keeps working while it charges, which helps when it runs off a power bank in camp. Four blue indicator LEDs show charge in 25% steps. The 500 mAh cell is small. Light users will get days out of it on Low, but heavy night use needs a top-up from the same bank that charges the phone. Because the battery is sealed, a worn-out cell means a new headlamp.

Weather and durability. IP66 covers dust and heavy water jets, and one reviewer’s shower test confirmed it. The housing is polycarbonate, rated to survive a 1 m drop. The weak point reported by owners is the plastic bracket that joins the headband to the lamp, which feels thin and which some users flag as a long-term wear concern.

Headband. The reflective dual shock-cord band works if it isn’t cinched tight, and the lamp is light enough that most wearers stop noticing it. Hikers with smaller heads report the cord digs in, and some have bought a cloth band to replace it.

Choosing a Version

The NU20 is offered in two versions, the 38 g Classic and the 47 g Standard. The 9 g gap, about a third of an ounce, is the number that matters. The Classic is the pick for gram-counters, and it is the version where an aftermarket headband gets the setup near 32 g. The Standard suits hikers who care less about the last few grams and want the same 360-lumen, three-source, IP66 package. For a thru-hiker, 9 g is hard to justify on a camp light. Anyone who isn’t counting every gram loses little by choosing either.

Pros & Cons

Pros

• 38 g in Classic trim, with room to drop to about 32 g
• About $25 for three light sources: white, high-CRI white and red
• 1-lumen low mode for tent tasks
• USB-C charging in just over an hour, with the lamp usable while it charges
• Electronic lock and four-LED battery meter
• IP66 and 1 m impact rating
• Simple controls that work with gloves

Cons

• Turbo steps down from 360 to about 200 lumens within roughly 30 minutes
• Sealed 500 mAh battery can’t be swapped
• Headband bracket feels flimsy
• Shock-cord band doesn’t suit every head
• No mode memory; every power-on starts at Low
• Secondary modes are easy to forget

Who Should Buy This

The NU20 suits the ultralight backpacker who hikes in daylight and uses a headlamp for camp chores, in-tent reading and the occasional early start. It also works as a backup light that rides in a pocket and costs less than a dinner out. Anyone who night hikes, runs for hours after dark or goes long between charges should look at the NU25 or a larger-battery lamp, accepting more weight and a busier interface.

Verdict

The NU20 does what a sub-40 g, $25 headlamp should, and it does it with less fuss than most. The sealed battery, the thin bracket and a Turbo mode that fades are real limits, but they matter mainly to night hikers. Everyone else gets a lot of light for very little weight and money.