how do i fix this?

[ironmetalx]

i bought a green laser and sometimes it puts out good power but the batteries are sort of loose in the case and sometimes theres a faded dot or no dot at all. how do i fix this?

 

[lasersbee]

Some of the members here have posted in the past that a piece of
crumpled up aluminum foil could take up the slack...

Jerry

 

[jwc]

I use a couple of magnets.

 

[phoenix77]

You can also stretch out the spring a bit to make the batteries tighter, & if they rattle in the battery tube, put a strip of double faced tape on the batteries, just leave the outer protective strip on, so the batteries don't get stuck in the tube. rob

 

[ironmetalx]

i put copper in the top and a post it note inside the case so they wont rattle and it works now thanks .