For some reason I thought it came with a USB-rechargeable 14500

Some batches came with the USB rechargeable 14500, some did not.

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.

Yes, that’s the same light. Countycomm sells all kind of products under their brand, for a higher price, of course. Their photos are great, but the description…

this hardened steel ring is designed as a persuasion tool

🤣

Ja, absolut legal. Vorne kommt kein kohärentes Licht raus, daher keine Beschränkung.

Anfangs, als LEP-Lampen noch neu waren, hatten Hersteller die Laserklasse des intern verbauten Lasers angewendet, was etwas verwirrend war.

$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.

This causes two issues, the regular introduces a lot of RF noise

Yes, unfortunately that is true …

and the voltage is flat right up to the point of complete exhaustion so you can’t tell when the battery is ready to crap out.

There are many models with a voltage warning (either dropping to 1.1V or slowly decreasing voltage):

If there are two batteries in series, you could also try a single LiFePO₄ (with protection circuit), as it keeps a rather stable voltage around 3.2V.

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.

It has a few features more and a few features less. Depends on what you need.

Mostly I wear it on a lanyard around my neck, thus no scratches so far.

Sometimes I’ve seen it as low as $70 with discounts on AliExpress. Not sure how it ends up after tax, tariffs, whatever.

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.

It looks like this light has a tail clicky?

It has an electronic tail switch, just like the regular TS10.

Do you know what CPU it uses?

t1616, just like the regular TS10.

Where is the lanyard hole? I don’t see it in the photos, though I see an included lanyard mentioned.

It doesn’t have a hole in the flashlight, just in the clip.

Too bad about the low CRI led. I’d prefer a floodier beam but that depends on the user.

Then get the regular TS10 that is available since 2022. Floody and high CRI.

Should there be any issue with using a USB-rechargeable 14500 in the TS10?

I use USB-C rechargeable batteries from Manker and Acebeam in all of my TS10.

Is it possible to leave the aux leds on with minimal battery drain as locator lights, like some Hanklights can?

Of course, at least in low brightness. The high level drains the battery in just a few days.