The Fenix SD20 is designed primarily as a diving torch offering a maximum output of 1000 lumens, and thanks to the built-in overheat protection it can also be used out of the water.
Powered by two 18650 rechargeable lithium-ion batteries, this 100 metre submersible torch provides low and high white outputs and a red light output.
The modes are easily selected by twisting the magnetic selector ring to the desired output. You can also select the battery level indicator with the magnetic ring which will display a constant red light for sufficient power, a slow flashing red light for low power and a quick flashing red light for critical power.
The SD10's body is constructed using a dual layer anti corrosion design and features twin O-ring sealing to protect against water ingress.
1. When the light works at High output, if the detected voltage is lower than the preset voltage of 6.2V, the output will automatically downshift to 400 Lumens.
2. When the light works at High or Low output, if the detected voltage is lower than the preset voltage of 6.0V, the output will automatically downshift to 100 Lumens.
3. When the light works at the Red light mode, if the detected voltage is lower than the preset voltage of 6.0V, the output will automatically downshift to 25 Lumens.
Double layer body tube protects again corrosion
Intelligent overheat protection to avoid high surface temperature
Low-voltage warning function to remind users of low power
Rotating magnetic ring fro one handed selection
Enlarged lanyard hole for quick attachment
Digitally regulated output maintains constant brightness
Low: 400 lumens; 7 hours, 30 minutes run-time; 108 m beam range
High: 1000 lumens; 3 hours run-time; 172 m beam range
Red: 105 lumens; 8 hours run-time; 73 m beam range
Tested to ANSI/PLATO FL1 standard using two Fenix 3400 mAh 18650 lithium-ion batteries.
Note: The intelligent overheat protection will automatically lower the output if the internal temperature of the torch reaches 65°C or above, in order to protect the LED from overheating.
Note: Although the SD20 can use CR123A lithium metal primary battery cells, we recommend lithium-ion rechargeable cells to be used with the SD20, this is because you should not get lithium metal cells wet.
Important Battery and Battery Charger Information
Primary Cells - Please note that CR123A lithium metal primary battery cells are not rechargeable.
Rechargeable Cells - If you are intending to use lithium-ion rechargeable batteries then you will also need to purchase a suitable battery charger if you do not already have one.
Please click on the Accessories tab above to view compatible batteries and battery chargers.
Type: Diving torch
Operating Modes: Low / High / Red
Luminous Flux: Up to 1000 lumens
Lamp Type: 1 x Cree XM-L2 U2 white LED and 1 x Cree XQE red LED
Beam Range: 172 m (on land)
Recommended Battery: 2 x 18650 lithium-ion
Run Time: Up to 7 hours, 30 minutes (low setting)
Overall Length: 208 mm
Head Diameter: 40 mm
Barrel Diameter: 26 mm
Weight: 245 grams (excluding batteries)
Body Colour: Black with orange ring
Body Material: Durable aircraft grade aluminium
Body Finish: Premium Type III hard-anodised anti-abrasive finish
Lens Type: Toughened ultra-clear glass lens with anti-reflective coating
Switch Type: Rotating magnetic selector ring
Environmental: Waterproof to IPX8 standard (100 m depth)
Warranty: 5 years
Regulatory Compliance: CE / RoHS
Packaging and Contents
Supplied in retail packaging and includes:
Fenix SD20 LED diving torch x 1
Lanyard x 1
Spare O-ring x 1
Batteries (see options above)
Manual x 1