Wurkkos DL30 Diving Flashlight Review – 21700 – LH351D 5000K 90CRI Neutral White

Last Update 19-03-2021

Wurkkos DL30 Diving Flashlight Review, this one is one of the latest flashlights from Wurkkos, a chinese flashlight company.
The main idea behind it is that it’s meant to be a diving flashlight or at least one used in water and around water.

It mounts 3x Samsung LH351D 5000K neutral white LEDs with a CRI (Color Redention Index) of 90, so it should show colors well.
The LEDS are coupled with a specific driver powered by a Liion 4.2v 21700 flat top battery (included).

There are 3 power outputs selected via a magnetic ring, 350lm (6h approx), 1300lm (2h approx) and 3500lm (1:30h approx), I have no means to measure the output yet but it seems pretty close.
You can skip the first 2 and jump to 3 by turning the ring at once, the 4 clicks are solid and sound, no wiggling.

The driver is pretty simple but has advanced features like thermal regulations, it steps down when reaching 55c but does not step back up if it cools down. LVP is present, the light flashes once a minute when the battery is low, allowing the user to emerge and change the battery.

Last, to keep the water out there are 2 orings to seal the body from water and the walls are thick enough to withstand abuse and use.

The box comes with a rarely seen complete kit:

– Wurkkos DL30 Diving Flashlight
– Wurkkos labelled 4800mah 21700 lion battery, flat top
(4.477mah measured on the first cycle charge)
– cardboard battery protection (remove before use)
– 2 spare orings
– a generous rubber padded lanyard ring not to loose the light underwater (no GITD attachment, if you loose the light while off, it’s gone)
– a charger with micro usb to usb A cable
– and a white plastic 18650/21700 adapter, no copper extention is needed as the light has 2 springs
– instruction manual

I have yet to test it underwater or on the boat but as an EDC-Work light it’s excellent! the 3 power modes are good for daily use and the beam is a nice floody beam with a large center spot.


✦Reflector: smooth reflector
✦Water resistance IPX-8 (it’s said to resist 100mt dephts)
✦Toughened mineral glass lens
✦Operating voltage: 3.0V – 4.35V
✦Weight: 130g/0.28lb (without battery)
✦Emitter: 3x Samsung LH351D 5.000K 90CRI
✦Battery options: 1x 21700 or 1x 18650 Li-Ion battery
✦Dimension: 118mm (length) x 41mm (head diameter)
✦Reverse polarity protection to protect against improper battery installation.
✦Automatic stepdown: Turbo mode steps down after 90 seconds of operation to prevent overheating. To reactivate Turbo mode, turn the side switch once again.
✦Advanced Temperature Regulation (ATR) technology: ATR automatically reduces the brightness level when the driver temperature reaches 55°C to prevent overheating
✦Low voltage warning: When the battery voltage is low, the LEDs will start to flash quickly once every minute as a reminder to replace the battery. Please replace the battery in time to avoid any danger while diving.
✦ Flashlight body: Aerospace grade 6061 grade aluminum alloy, CNC manufactured to hard-anodized to military grade specification type III, anti-abrasive finish to get solid built body, anti-crash geometry and better heat exchange.


The Wurkkos DL30 arrives in a simple printed cardboard box.


A rarely seen complete kit with all you need to be ready for adventures, both under and above water.


The Light


it has a smooth aluminium reflector, no orange peel or TIR

3x Samsung LD351D 5000K neutral white LEDs with a CRI (Color Redention Index) of 90.


4 steps magnetic power selection ring.

I’d really love to see a version with stepless ring or stepless with 3 fixed levels, to have a real moon-low and the higher levels depending on use, hey Wurkkos!? can you hear me?


the battery goes with the positive “+” towards the LEDs


The walls are pretty thick to withstand use-abuse and the high pressure, remember it is declares it can be submerged to 100mt – 10bar


There are 2 copper springs to allow the battery not to rattle and 2 orings to keep water and moisture out.


Included are a charger and USB micro to A cable, you will need a 1A input socket or power supply to charge, the charger has a 1A input and 0,75A output, not fast but ok.

NOTE: it does not state 21700 batteries but it works and fits them (flat top only)


I have a ton of 18650 batteries at home and in my kits, what buggers me is having to carry spare 21700s, so I’m happy to find an adapter in the box from 18650s to 21700s, I usually keep spare batteries and adapters so I don’t have to always think abut what batteries I need every time.

The worst is having spares, wrong spares…

The included lanyard is pretty long and has a rubber tube to keep it from sliding and turning around too much, I’ve never seen this before


The included 21700 lion battery is stated 4800mah and 48ah.

To me as it measures 4.477mah on the first grading charge on my XTAR VC4S and cannot be 48ah could be a Samsung 50E rewrapped, so it’d be 4500mah+- and 10A current.

Testing my 50E the output is exactly the same to my eyes.


Some size shots:


Action Shots!


mode 3 shot

mode 3 shot

Mode 3 shot


Mode 3 shot


Action Shots for all reviews will be added during time, not easy to test everything with coronavirus…check back soon!

Last Words and Conclusions:

The DL30 was bought from amazon directly
Price is around 50€ with a 10% discount from the original 54,99€
If there are discount codes, I’ll add them later!

What I like:

  • GREAT Price and quality
  • great anodizing and grip
  • runs on 21700 and 18650 rechargeables
  • powerful
  • thick alu
  • nice magnetic ring

What I DON’T like:

  • only 3 modes, ramping would be better

Other considerations:

  • none right now

the light was bought with my own money, i was not paid for the review

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