
Fenix SD20 (2017) review
The Fenix SD20 (SD20) released in 2017. It uses 1 x Cree XM-L2 LED, 1x Cree XQE RED LED, SMO reflector and 2 x 18650 Li-Ion batteries. The powerful emitter in this diving light provides up to 1000 lm output, 7400 cd intensity, and a beam distance of 172 m.
This light has 2 modes of lighting. This light does not have memory function.
Table of contents:
Fenix SD20 (SD20) specifications
- Brand
- Fenix
- Name
- SD20
- Type
- SD20
- Rating
- Launch
- 2017
- Form
- diving light
Body
The aluminium body of flashlight treated with a Type III hard-anodized, anti-abrasive finish.
- Weight
- 245 g
- Length
- 208 mm
- Body diameter
- 26 mm
- Head diameter
- 40 mm
- Material
- aluminium alloy with HAIII hard-anodized finish
- Colors
- black
System
The emitter of SD20 manufactured by Cree, a US-based LED manufacturing company. The SD20 has a smooth reflector. The properly focused smooth reflector gives you a more cohesive hotspot and therefore throws better. It has an AR coated lens.
- Emitter
- 1 x Cree XM-L2 LED, 1x Cree XQE RED LED
- Color temperature
- 6500 K
- Reflector
- SMO
- Lens
- toughtened AR coated glass
- Switch
- rotary front
Performance
The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.
- Flux
- 1000 lm
- Intensity
- 7400 cd
- Throw
- 172 m
- CD/LM factor
- 7.4
Software
- Modes
- 2 modes
- Mode memory
- no
- Ramping mode
- no
- Strobe
- no
- SOS/Beacon
- no
Features
The battery indicator lets you know when the battery is low, charging, or fully charged. The SD20 cannot charge batteries directly. You may need an external charger to keep your battery going. This flashlight has a built-in low voltage protection (LVP) to prevent damage to the cell from over-discharge, so protected cells are not necessary. The built-in thermal control automatically adjusts brightness output to prevent overheating.
- Battery
- 2 x 18650 Li-Ion batteries
- Battery indicator
- yes
- Charger port
- no
- LVP
- yes
- Thermal regulation
- yes
- Protection
- depth 100 meters
- AUX LEDs
- no
- Magnetic
- no
- Specials
- red light
white light
Accessories
The lanyard prevents accidental loss of the flashlight.
- Package contents
- conducting plate
lanyard
spare o-ring
The performance of the Fenix SD20 flashlight is measured according to the ANSI / NEMA FL1 Standard 30 seconds after switching the light on. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.
The specifications above are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Fenix SD20, then don’t hesite and signal the problem to us.
Fenix SD20 (SD20) pictures

If there’s information about the Fenix SD20 that you would like to see on this site, then write to us.