That’s why I mentioned it in the review:

there is a USB-C port for charging the built-in battery.

It is not replaceable by the user with a standard battery.

Boost drivers have a big advantage: Much higher efficiency, especially on low brightness. There are great examples like drivers designed by thefreeman or loneoceans. Unfortunately Wurkkos’ engineers are still learning.

Is moonight done with PWM?

It’s a boost driver with PWM input, probably low-pass filtered, but from what I heard it’s rather unstable.

It drains a battery in about three weeks on high aux.

AFAIK aux LEDs should turn off at 2.7V. Was it sitting at high aux level?

If you have access to a 3D printer: While I haven’t tried it myself yet, it should be possible to combine my plate with Spicy3d’s HB3 adapters.

In addition to the advantage mentioned by Zak, it also depends on the usage. A flashlight that I need every evening (dog walks) is easier to charge with the magnetic charger. Not great for the battery, but I prefer to have a fully charged flashlight when I start my walk.

A twisty as a headlamp. In a silicone bracket. Good luck adjusting and controlling it. 😂

Also, 3lm lowest level, no shortcuts, unknown LED. Nope.

Don’t see it as a flashlight, more as a stylish fidget toy. 😉

Still not enough for calibration. This sensor is not able to give you CRI or correct duv values. It can estimate the CCT, though.

Read this thread for all the problems when using these sensors:

https://budgetlightforum.com/t/diy-spectrometer-as7341-based/70375

In short: not good for testing flashlights.

$140

https://nitecorestore.com/products/edc37-usbc-rechargeable-bright-flat-flashlight

Does it appear to have 2x 21700 inside?

More like 2x 18650. There’s a rendering on the official website that shows 2x 18650 4000mAh, that was also used in the EDC31.

https://flashlight.nitecore.com/Uploads/attached/image/20250604/20250604094746_35890.jpg

Can it operate as a USB power bank?

Nope.

It depends. In winter, when I need my headlamp every day, I prefer to use a H150 or H04 with magnetic charging, so that I can quickly (dis)connect it. I can do the same with the M200, if it needs a charge.

When I’m not at home or don’t need the flashlight often, USB-C is usually easier because I don’t need to take the special adapter with me or have it cluttering my desk.

I live in a world of mostly Li-ion batteries around me, NiMH come second. Primary (alkaline) batteries? Nope, never use them because of their poor performance, environmental problems and because they leak.

Not all of my devices can charge their Li-ion batteries. A simple charger is enough in most scenarios. You only need an analyzing charger if you want to monitor and maintain the performance of your batteries.

Not exactly. Both have a clip on their rear side, but otherwise are very different.

How is the beam shape? The EC4SW is pretty floody for a reflector based light, which I personally prefer.

It can be both, thanks to the UHi 20 MAX. The main limitation is that the selection of flood/throw is linked to the brightness level.

They made a light a while back with two side by side 18650s inside and that’s what I expected on seeing the pic.

Do you mean the mighty EDC37? That one isn’t released yet.

The review has a whole section about it.

CRI 95 SFT-40? Count me in! Thanks for the giveaway!