Image not available$31.99
1 retailer
HS41 21700 USB C
The Sofirn HS41 21700 USB C is a 4,000 lm, 0.17 lb headlamp. It runs on 21700 and charges over USB-C.
- Max output
- 4,000 lm
- Beam
- Not published
- Weight
- 0.2 lb · 79 g
- Battery
- 21700
Image not availableColor not published
What the data says
- Lighter than 100% of the 9 other lights we list in the 3,500–4,500 lm range.
- Lowest in-stock price is 10% below list price this week.
Computed from the specs below. How we write summaries.
Full specs
Last verified Oct 5, 2026
Sofirn’s own site doesn’t allow automated reading, so specs, prices and photos come from Flashlightgo’s product page (flashlightgo.com), a retailer that sells it. Unless marked otherwise, every spec is quoted from that page.
| Max output | 4,000 lumens |
|---|---|
| LED | Luminus SST-20 (x4) |
| Color temperature | 5,000 K |
| Battery | 21700 |
|---|---|
| Built-in charging | USB-C |
| Type | Headlamp |
|---|---|
| Weight (manufacturer) | 0.17 lb (79 g) |
| Length | 11.5 cm (4.5 in) |
| Body | Aluminum |
| Water rating | IP68 |
| Magnetic tail | Yes |
|---|---|
| Built for | Outdoor, Work |
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