I was intrigued because I’ve been on sort of a rectangular keychain light kick lately and the E18 is the first that claimed to have a “stepless ramping” UI, so I decided to check it out.
After a quick trial run, frankly there’s not much here that excits me about the light so I won’t do a detailed review. The Jaxmnve E18 is a basic economy light. Nothing outstanding, new or different. But for the benefit of others here’s a quick look and compare.
Some details
- Emitter XP-G2 Cool-Neutral (nice tint actually)
- Smooth reflector, relatively throwy
- Built-in USB Re-chargeable 220 mAh battery
- L-M-H+ hidden strobe, w/last mode memory for all modes including the hidden (3-quick clicks from On) strobe
- Also optional “stepless” ramping UI mode
- Al Body (available in Red, Black or Silver)
- Weighs 36g w/clip
Here’s the pacakge as received with pictured accessories -

Here’s a look at the light compared to some other keychain lights mentioned in this thread for comparison.
(From Left to Right) Nitecore Mini — Manker LAD — Jaxmnve E18 — Nitecore TIP — Astrolux K1

Here’s a photo of the same lights, in the same order, lit. It’s a mixed batch, some XP-G’s and Nichia’s, some warm and some cool.

Here’s a look at the business end.

The E18 is a “solid” light, literally. The body and head each appear to be machined from solid stock. While I was hoping the additional product specification weight was the result of a larger battery, it’s actually from the thicker material of the head and body. The extra mass should help with heat sinking when the E18 is on High (3W or 200-250 Lumens; although a higher turbo mode might have been nice.)

The XP-G2 emitter is cool-neutral with no objectionable off-tints. It throws relatively well and has good reach on High (250 Lmn) as keychain lights go.
I was initially attracted to the E18’s “stepless ramping” UI, however the E18’s relatively narrow lumen range from low to high defeats the need for ramping. The low doesn’t go quite low enough and the high is not particularly bright compared to the top end of the other lights in the line-up. All three modes L-M-H and the ramping Min-Max fall within the middle-to-high range of the comparison lights. Thus the lack of direct access from Off to either Low or High are moot since there is no Moonlight or Turbo.
Here is a light level comparison between the Jaxmnve E18 on Low/Medium/High

vs (all photos taken at the same camera exposure settings and color removed for comparison purposes)
the Nitecore TIP on Low/Medium/High (Turbo is not shown)

The Jaxmnve E18 probably works if you need something small (there are smaller), solid (I’m confident it would withstand being driven over by a car as one LAD reviewer did), and basic (one button; 3-levels). As for me. I’m moving along because there’s nothing to see here.
Edit - added light level comparisons