Want Your flashlight to last? Stop using these . . .

Got Lumens?

Flashlight Enthusiast
Joined
Mar 12, 2011
Messages
2,458
Location
Champlain Valley
Promlights.png





Don't Let THIS
Happen to Your Flashlight


Alkalinecorroded47s_800.jpg


Alkaline Battery Warning

Hi folks,


Sorry for interrupting your day, but I wanted to issue this PSA: Alkaline batteries should
not be used with your Foursevens flashlights.

Alkalines are designed for low-power applications like TV remotes. The strain on the
battery causes it to release gas that will corrode the interior of the battery tube, leading
to the buildup of a thick black layer of oxidation, and ultimately the failure of the light.
This problem is made worse by the high power demand of the Foursevens lights, the raw
metal surface, and the sealed environment (compared to your TV remote).
How the problem was discovered:


I received a​ number of non-operational lights that suffered from this problem to varying
degrees.
I previously encountered this issue with the Prometheus Lights Beta QR over a year ago,
so I knew right away what I was looking at – Alkaline batteries venting under stress.
Some users also reported an audible "pop" from the pressure buildup when opening the
head after prolonged use.


The problem is more pronounced if you run the light frequently and at full power. By the
same token, if you don't use your light frequently and/or at low power, you probably
don't have an issue. If you use Lithium disposable or rechargeable NiMh batteries (as
recommended) the venting and subsequent corrosion will not occur.


Steps you can take:



  • [*=left]
    Stop using Alkaline batteries :) If you don't like wasting money, you should look for
    some brand name Nickel Metal Hydride (NiMh) batteries
    online or at your local
    hardware store. We're currently running a
    30%dealonthisbattery&chargerbundle.
    If you feel the need to purchase batteries you have to throw in the trash, I
    recommend Lithium disposable.
    Please note, you may NOT use lithium-ion rechargeable batteries.



    [*=left]
    Check the inside of your battery tube for corrosion. It takes quite a bit to cause
    the light to fail; a small amount of corrosion is tolerable. If your light works, please
    keep using it, just change your batteries. At this time it is not clear if the corrosion
    will stop progressing, or continue to grow when the corrosive agent
    (Alkaline battery) is removed from the light.



    [*=left]
    If your light is black inside and no longer works, please email me at [email protected]
    to make arrangements.

Thanks for your support and sorry about any inconvenience this might have caused.


Jason

ShopRechargeableBatteries.png






Exploding Flashlights:
What You need to know


Fail1.jpg

We recorded a short episode of "I'm No Expert" in response to a handful of reports (some recent)
of 2-cell lithium flashlights exploding. One instance in November resulted in a fatality – the user
had his flashlight in his mouth while working under the hood of his car.
(For the record: these were NOT Prometheus Lights or Foursevens flashlights.) In the interest of
safety, we put together this PSA to help you all understand what is likely causing this to happen
and, most importantly, how to prevent it. Any 2-cell lithium light has the potential to pose the
same danger. Be informed.



ListenNow.png



TWO NEW Products

Up on The Site

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Munky Spunk


Munky Spunk delivers superior lubricity on titanium, stainless,

and other tough metals. This stuff works when nothing else will.

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TritTailcap_290.jpg

Tritium-Ready Tailcap

Get your glow on, everyone loves tritium! Many people have

requested a tritium tailcap and here it is!

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Last edited:

Got Lumens?

Flashlight Enthusiast
Joined
Mar 12, 2011
Messages
2,458
Location
Champlain Valley
Your images do not show up.
Sorry :(. You can right(secondary) click the image place holder and open the images url in a new window or tab. Apologies my new replacement for Photobucket has incompatibilities with TapaTalk and a few browser configurations.
 

ven

Flashaholic
Joined
Oct 17, 2013
Messages
22,533
Location
Manchester UK
Thanks for the info, i find it still hard to believe people use alki leaks in their expensive lights(or any lights for that matter).

Too add, never thought i would say it, but i think i need some munky spunk! :naughty:
 
Joined
Mar 12, 2010
Messages
10,205
Location
Pacific N.W.
Here ya go.

~ Chance

Promlights.png





Don't Let THIS
Happen to Your Flashlight


Jkh2rLD.jpg

Alkaline Battery Warning

Hi folks,


Sorry for interrupting your day, but I wanted to issue this PSA: Alkaline batteries should
not be used with your Foursevens flashlights.

Alkalines are designed for low-power applications like TV remotes. The strain on the
battery causes it to release gas that will corrode the interior of the battery tube, leading
to the buildup of a thick black layer of oxidation, and ultimately the failure of the light.
This problem is made worse by the high power demand of the Foursevens lights, the raw
metal surface, and the sealed environment (compared to your TV remote).
How the problem was discovered:


I received a​ number of non-operational lights that suffered from this problem to varying
degrees.
I previously encountered this issue with the Prometheus Lights Beta QR over a year ago,
so I knew right away what I was looking at – Alkaline batteries venting under stress.
Some users also reported an audible "pop" from the pressure buildup when opening the
head after prolonged use.


The problem is more pronounced if you run the light frequently and at full power. By the
same token, if you don't use your light frequently and/or at low power, you probably
don't have an issue. If you use Lithium disposable or rechargeable NiMh batteries (as
recommended) the venting and subsequent corrosion will not occur.


Steps you can take:



  • [*=left]
    Stop using Alkaline batteries :) If you don't like wasting money, you should look for
    some brand name Nickel Metal Hydride (NiMh) batteries
    online or at your local
    hardware store. We're currently running a
    30%dealonthisbattery&chargerbundle.
    If you feel the need to purchase batteries you have to throw in the trash, I
    recommend Lithium disposable.
    Please note, you may NOT use lithium-ion rechargeable batteries.



    [*=left]
    Check the inside of your battery tube for corrosion. It takes quite a bit to cause
    the light to fail; a small amount of corrosion is tolerable. If your light works, please
    keep using it, just change your batteries. At this time it is not clear if the corrosion
    will stop progressing, or continue to grow when the corrosive agent
    (Alkaline battery) is removed from the light.



    [*=left]
    If your light is black inside and no longer works, please email me at [email protected]
    to make arrangements.

Thanks for your support and sorry about any inconvenience this might have caused.


Jason

Shop Rechargeable Batteries




Exploding Flashlights:
What You need to know


9GYbXUL.jpg

We recorded a short episode of "I'm No Expert" in response to a handful of reports (some recent)
of 2-cell lithium flashlights exploding. One instance in November resulted in a fatality – the user
had his flashlight in his mouth while working under the hood of his car.
(For the record: these were NOT Prometheus Lights or Foursevens flashlights.) In the interest of
safety, we put together this PSA to help you all understand what is likely causing this to happen
and, most importantly, how to prevent it. Any 2-cell lithium light has the potential to pose the
same danger. Be informed.



Listen Now

TWO NEW Products

Up on The Site

MunkySpunk_290.jpg
sT0ksZp.jpg



Munky Spunk


Munky Spunk delivers superior lubricity on titanium, stainless,

and other tough metals. This stuff works when nothing else will.

>>>Buy Now<<<
6UXm31Z.jpg

Tritium-Ready Tailcap

Get your glow on, everyone loves tritium! Many people have

requesteda tritium tailcap
and here it is!


>>>Buy Now<<<
 
Joined
Mar 12, 2010
Messages
10,205
Location
Pacific N.W.
Thanks for the info, i find it still hard to believe people use alki leaks in their expensive lights(or any lights for that matter).

Too add, never thought i would say it, but i think i need some munky spunk! :naughty:

:paypal: for four cc's. Can't wait to ask The Lovely Mrs. Gardiner to apply some Munky Spunk to my flashlight. :p

~ CG
 
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