Questions about Energizer E2 Lithium HL

[Phaserburn]

Does the top strap come off? How wide is the beam? I'm assuming from what I could read that it emits a uniform, no-hotspot beam. Are their rings/artifacts? How well does the adjustable beam function work?

Anyone know if there is a circuit or just resistors inside? I would like to know how the output is vs the diffused Hardcase and/or EOS 2. I'm not interested in throw. Waterproofness?

Any other comments would be appreciated. I'm wondering why this HL is not getting any airtime. It looks quite nice.

 

[likeguymontag]

It looks interesting. Do you know whether it's available at B&M stores? I'd want to look at it before buying it, and have the option of an easy return. Same with the Hard Case.

 

[Phaserburn]

hey... no one has these?

:thinking:

 

[gillestugan]

I have not seen it, but from the specifications it is clear it has a driver: "Switching of Energizer e2 Lithium LED Headlight:
• press the top button repeatedly to cycle through modes
red - high white - medium white - low white - strobe*
• if next mode is not chosen within 3 seconds, the headlamp will turn off the next
time the mode button is pressed
• Boost (located on side) - press and hold button for 140 lumens of super bright
light (up to 15 seconds); once button is released, the
previous lighting mode will return. (boost button is for temporary use only)"

Here is one review that doesn't really answer any of the questions.

The aluminum housing looks good. Maybe you can do a cheap mod by putting a R2 bin in it together with a 7135 based driver.

 

[likeguymontag]

I have not seen it, but from the specifications it is clear it has a driver: "Switching of Energizer e2 Lithium LED Headlight:
• press the top button repeatedly to cycle through modes
red - high white - medium white - low white - strobe*
• if next mode is not chosen within 3 seconds, the headlamp will turn off the next
time the mode button is pressed
• Boost (located on side) - press and hold button for 140 lumens of super bright
light (up to 15 seconds); once button is released, the
previous lighting mode will return. (boost button is for temporary use only)"

Here is one review that doesn't really answer any of the questions.

The aluminum housing looks good. Maybe you can do a cheap mod by putting a R2 bin in it together with a 7135 based driver.

I've seen nothing indicating whether it uses a current regulated driver though. One of the reviews I read said that the housing is made of aluminum, and not just shiny plastic, so I'll definitely investigate further if I ever find it for sale at retail. I'm just not curious enough to order one.

 

[gillestugan]

You are right, it may be only PWM regulation and a resistor, but that would make output vary a lot between different battery types. For example many AAA Ni-Mhs drop very fast to around 1.1V when driven at 0,5A or higher. The energizer AA lithium batteries can easily maintain 1,5V at high currents. This would make the headlamp more than twice as bright when driven by the Lithiums.
But then again, it is not impossible. Sometimes you get amazed how bad designed som lights are.

 

[kevinm]

I picked up one at Target for $40. It's going back due to the worst beam I've seen. It's a moon beam (tight or wide) with little throw and nearly uniform brightness. When focused, there are artifacts. The top strap does not come off. The housing is aluminum and looks waterproof. Oh, and it's heavy. I'll take it apart later tonight and see what's inside.:grin2:

Kevin

 

[ltiu]

http://www.candlepowerforums.com/vb/showthread.php?t=229412

 

[ltiu]

It looks interesting. Do you know whether it's available at B&M stores?

Academy (2 battery pack version, both AA and AAA). ~$44.
Target (1 battery pack version, AA only). ~$39.

 

[kevinm]

Okay, I took it partially apart. I can't tell which type of regulation it has from the circuitry. There's a lot of it. Mostly, resistors, capacitors, and inductor, and some IC under a glob of epoxy. The layout is weird. The red LED's could be swapped easily, but the main one would be tougher.

Heat sinking looks pretty good. The led mounts against a metal piece that contacts the outer casing. There's little or no room for a reflector of any depth.

I give it an "eh".

Kevin

 

[Phaserburn]

Do you think it's regulated, or merely resistored?

 

[kevinm]

Do you think it's regulated, or merely resistored?

I'd guess some form of regulation, based on the number of components.