Battery cap keeps falling off

[boingboing]

Hi all,

I've got a nifty keychain laser pointer that the battery cap keeps falling off. Additionally, unless the cap is at a certain tightness, the laser fails to come on. Twist the battery cap a little, and it lights up fine. So clearly some sort of conductivity issue.

Is there some sort of solution for both of my problems? I've been researching threadlockers, which all appear to not conduct electricity. Ideally, some sort of mild-adhesive that conducts electricity. This way it holds the cap on and assists w/ conducting electricity. And, with just a little work, I am able to break it loose for the next set of batteries.

Any ideas along these ideas or another line of thought?

Thanks!

 

[Cyparagon]

Do you have... ANY idea... how cheap and plentiful red pointers are these days?
Just get a new one. It'll be cheaper than trying to fix your old one, and it'll probably work better too.

 

[boingboing]

Do you have... ANY idea... how cheap and plentiful red pointers are these days?

About Three-Fiddy? And Uber? Those are just guesses though, my official answer is "no, I don't".

Just get a new one. It'll be cheaper than trying to fix your old one, and it'll probably work better too.

This is a green one that I really like due to its size. I've been through about 4 small keychain laser pointers and really like this one for the size/brightness ratio. It comes in at 2.5", tip to tip, and is 'very bright' compared to other keychain green laser pointers I've used.

I know I didn't mention it was green in the first post, sorry about that. To my knowledge, green keychain pointers aren't readily available that are cheap and small that are bright too. (I honestly am on the fence with agreeing that a 3.5" laser is a "keychain" laser that some folks label them as.) Having said that -- if you do, I am all ears and would appreciate any guidance. That is a descent solution if they are plentiful and fairly cheap now-a-days.

I use it for pointing out saltwater coral in brightly lit reef aquariums. The common red lasers get drowned out by the 1000+ watts of light above the reef tank. (I'm sure there are high powered ones that don't.) But the greens, even the fairly weak ones, stand out nicely in this environment.

What makes it worse is that I can't remember where I got this little guy. I've bought so many over the years that were just junk and can't remember where I got this one.

Thanks!

PS: I just looked on eBay. About Three-Fiddy, landed, was pretty close! lol!