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Corrosion in EDC Flashlight
#1
I pulled out my handy EDC light to use it under my car hood a few evenings ago. It flickered a bit, shone solid, then went out. Took it inside and found it had corroded pretty badly. I soaked it with vinegar, dried it out, then again in a baking soda paste to stop the corrosion. I tried to find a decent brush to clean the body with, then found that the copper brushes I don't use from my gun cleaning kit worked great! 

So, now its all clean, had a rubbing alcohol wipe down, and is now drying for a few days. Do y'all have any tips on cleaning out something like this? Or how to prevent it? Would a product like a gun oil help prevent corrosion?
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#2
(04-25-2018, 08:49 PM)A3M0N Wrote: I pulled out my handy EDC light to use it under my car hood a few evenings ago. It flickered a bit, shone solid, then went out. Took it inside and found it had corroded pretty badly. I soaked it with vinegar, dried it out, then again in a baking soda paste to stop the corrosion. I tried to find a decent brush to clean the body with, then found that the copper brushes I don't use from my gun cleaning kit worked great! 

So, now its all clean, had a rubbing alcohol wipe down, and is now drying for a few days. Do y'all have any tips on cleaning out something like this? Or how to prevent it? Would a product like a gun oil help prevent corrosion?
Hi, curious what brand of light it is? The answer may be a better light? I run surefires and stream lights and have never had that problem. I do remember it happening on mag lights 30years ago.

(04-25-2018, 08:49 PM)A3M0N Wrote: I pulled out my handy EDC light to use it under my car hood a few evenings ago. It flickered a bit, shone solid, then went out. Took it inside and found it had corroded pretty badly. I soaked it with vinegar, dried it out, then again in a baking soda paste to stop the corrosion. I tried to find a decent brush to clean the body with, then found that the copper brushes I don't use from my gun cleaning kit worked great! 

So, now its all clean, had a rubbing alcohol wipe down, and is now drying for a few days. Do y'all have any tips on cleaning out something like this? Or how to prevent it? Would a product like a gun oil help prevent corrosion?
Hi, I don’t know the answer but am curious what brand of light it is?
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#3
I'm curious what brand of light also.

Did a battery leak? Do you think it was just from moisture getting into the light?

I know my EDC lights are supposed to be IPX8 rated, so I would think that would prevent anything from getting inside the light except if the battery was the cause.
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#4
If you’re using AA or AAA baterries I would highly recommend Eneloop batteries over alkaline.  Alkaline can and do leak but rechargeable don’t.  Plus Eneloop can be recharged around 2000 times and still hold 70% of there charge after 5 years.  If it is a C or D cell then Tenergy is a good name brand.  Energizer Silver rechargeables are also good.
Governmental dependance makes for poor self reliance.

"What could possibly go wrong with a duct tape boat?"  Cody Lundin

The best defense against evil men are good men with violent skill sets.
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#5
Or just carry a spare plastic flashlight Smile

but leaking batteries can screw up almost any light... My extra flashlight in the truck is in a pouch with the batteries in separate zip lock...never an issue
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#6
It is a cheap one, its Coast brand. Its worked well for quite some time though. It uses a single AAA battery, and I was using an alkaline battery. I'll look into some rechargeables, it makes sense that they wouldn't leak.

I usually carry it clipped inside my back pocket, I pulled it out a few days ago and noticed some moisture in the lens and kinda brushed it off. There is an o-ring on the battery cap, maybe I'll go see if I can find a replacement before I put a new battery in it. I'm going to let it dry out for several more days. I haven't seen a way to get to the LED, so as far as I know the only opening is the battery cap.

Thanks!
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#7
If you have a Costco in your area they often have good deals on Eneloop battery packages with a good charger.  That is all I use in my AA/AAA lights unless it is capable of using a lithium ion.
Governmental dependance makes for poor self reliance.

"What could possibly go wrong with a duct tape boat?"  Cody Lundin

The best defense against evil men are good men with violent skill sets.
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#8
Well, I cleaned my flashlight out good and dried it for two days, then put a fresh lithium battery in it... nothing. Won't turn on. Oh well.
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#9
I never found a way to deal with corrosion other than to keep the batteries out of a flashlight.

Comment on the rechargeables. I decided last year to switch to rechargeables as much as possible. So, I purchased multiple set ups of the excellent Costco deal on Eneloops. I have a lot of Tenergy units as well. The three game cameras set up in the backyard take a lot of batteries. Well, I decided to review how much juice was left after three months. Ok. The batteries in the first unit were way down and probably not working. So, I set up recharging them and another set. Will take care of the remaining two units over the next day. Next, I will experiment and learn how much juice is left after two months.

Further comment: I had my suspicions that leaving a unit operable full time would run the batteries down fairly quickly. So, I tried to research some idea of the following. Take a flashlight. Put in a couple of AA batteries. One time use alkaline. The next time use eneloops or tenergy rechargeables. Which set lasts longer? No information except that the type of device like using a camera vs. flashlight makes a difference. There is probably is no good answer. So, my only conclusion is that if I keep the three game trail cameras going, it is going to be a lot cheaper with the rechargeables.
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#10
I had that happen with my 3 cell Mag light this past fall. After I cleaned it up I converted it to LED. I put some alkaline batteries back in but I put a light coating of dielectric grease on the ends of the batteries. If I had anything else that uses D sized batteries I would consider upgrading my charging station to something that could charge more than AA and AAA.
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