Fenix E0, retail $19.95* (www.fenix-store.com...)
Manufactured by Fenix (www.fenixlight.com)
Last updated 12-17-08

The Fenix E0 is a single AAA cell flashlight that has a white 5mm Nichia LED at the bottom of a brushed aluminum cone - this helps to act like a reflector.

It comes in a thick aluminum body, and uses - of course - one AAA cell for power.

* This prices ***INCLUDES*** shipping; something not seen with most other flashlight retailers.


Feed your E0 first (see directly below), and then you can go paint the town red - or in this case, white.

Getting light is as easy as turning the head clockwise (as if tightening it) until it lights up; turn it the other way to plunge yourself back in darkness.

To change the battery, unscrew and remove the bezel, gently place it on the ground, and kick it into the garden so the hungry, hungry praying mantids will think it's something yummy to eat and subsequently strike at it...O WAIT!!! THAT'S THE GOOD PART!!! So just set it aside instead.

Tip the used AAA cell out of the barrel, and dispose of or recycle it as you see fit.

Slide a new AAA cell in the flashlight barrel, orienting it so the flat-end (-) negative goes in first. Finally, screw the bezel back on; and unscrew it slightly when your E0 springs to life.
Aren't you glad you didn't kick that bezel into the garden with all those hungry praying mantids now?

Here is what a praying mantis looks like.
I found this guy on the morning of 09-08-06 clinging to the basket of my scooter.

Unable to measure current consumption due to how the E0 was constructed.

Photograph of the front of the E0, showing the LED and reflector.

The flashlight appears to be reasonably sturdy. Ordinary flashlight accidents should not be enough to do it in. I administered the smack test on it (fifteen whacks against the concrete floor of a patio; ten whacks against the side of the tailcap and five whacks against the side of the bezel), and found the expected damage. There is some *VERY* minor gouging to the bare Metalgreymon er the bare Metalikakkumon um that's not it either...the bare Metaltyrannomon...er...uh...wait a sec here...THE BARE METAL (guess I've been watching too much Digimon again! now I'm just making {vulgar term for feces} up!!!) on the sides of the tailcap and bezel where it was struck. These gouge are pinprick-sized; you almost need a magnifier to even see them. No optical or electrical malfunctions were detected.

By request of its sender, I placed it under the rear drive wheel of a 450lb (with me in it) electric wheelchair on concrete, and ran over it a couple of times...no additional damage was detected, and the product still functions properly.

The exterior finish is a Type III hard anodize ("HA-III" as us flashaholics know it), so it should stay new looking for longer, even if it goes up against keys, coins, or other flashlights during storage or transport.

The E0 is waterproof and submersible. When I removed the bezel, relieved the flashlight of its battery, and performed that dreadful suction test on the barrel, no air leakage was detected. I also tested the bezel by suctioning it, and no leakage was detected there either. So if it falls into water, just shake it off and keep going. If it falls in the kitty litter box and the kitty pisses on it, just douche it off under the faucet - good as new.
There is an O-ring on the barrel that engages when the bezel is screwed on, so I don't think the E0 will leak there.

The flashlight can be stood up on its tail on a dresser, counter, table, or other flat surface and beam onto the ceiling, acting like an electronic candle.

No battery rattle is evident even when the Fenix E0 is turned off & shaken quite vigorously; this is apparently accomplished by a spring at the bottom of the barrel.

The tint of the light emitted is a pure, slightly cool white with a noticeably bluish hotspot.

According to my contact at Fenix: "All our products being sold at the time being are not reverse-polarity protected. If the batteries are installed incorrectly, the circuit might be damaged. Though the rate is very low, we do need to install the batteries carefully."

Beam photograph on the test target at 12".
Measures 26,100mcd on a Meterman LM631 light meter.

Spectrographic plot
Spectrographic analysis of the LED in this flashlight.
USB2000 spectrometer graciously donated by P.L.

ProMetric analysis
Beam cross-sectional analysis.
Image made using the ProMetric System by Radiant Imaging.

Test unit was sent by D.C. of www.fenix-store.com on 10-07-06, and it arrived here on 10-14-06.

UPDATE: 12-17-06
I have decided to rate the E0 5 Stars and place it in The Trophy Case on this website.

Durable construction with HA-III
Water-resistant and even waterproof to shallow depths
Offers a good compromise between throw & flood (for a 5mm LED, that is)
Uses battery that is inexpensive and easy to find


    PRODUCT TYPE: Small handheld flashlight
    LAMP TYPE: 5mm white LED
    No. OF LAMPS: 1
    BEAM TYPE: Medium spot with dimmer corona
    SWITCH TYPE: Twist bezel on/off
    BEZEL: Metal; LED recessed into hosel for it
    BATTERY: 1xAAA cell
    CURRENT CONSUMPTION: Unknown/unable to measure
    SUBMERSIBLE: Yes, to shallow depths (~12") at minimum
    SIZE: 6.75cm L, 1.2cm D
    WEIGHT: 9g empty
    ACCESSORIES: O-ring, small split ring
    WARRANTY: Lifetime


    Star Rating

Fenix E0 * www.fenix-store.com...

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