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18650 or 2x 16340 batteries

Zator

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Or I can just attach a picture
 



GSS

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Well Zator, you posted on a 8 year old thread. No big deal to me but others might not like it.
Those thin long rods with the hex screws are just for show.
I'm guessing it's a 1W Blue laser? It will not run with just a single 3.7V to 4.2V cell. You will need 2 "16340's"
16340's are a popular cell so I can't understand why you cannot find them.

Edit: that is usually called a Gattling type host.
 

GSS

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CR2's are 3V I think so you won't get full output.
Ebay sights have them or try a vape shop. Try LiionWholesale, I think thats what it's called.
I will check...Also you seem to have the star cap on.
May I ask how old you are? Not judging your maturity but you really should lurk this forum to learn of the dangers.
 

Encap

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This thread is dead for 4 years . Necroposting on dead threads is very frowned upon on LPF --also avoid double and triple posting.

As mentioned by GSS---not possible to uinderstand that someone can't find a popular battery.
Google "16340 battery" they are available for dozens of seller web site --eBay, Amazon, many battery resellers--this place has several makes abd 22 different offerings of 16340 https://www.batteryjunction.com/batteries-size-16340.html

Take some time and learn about laser safety---you need to buy good laser safety goggles/glasses to avoid blinding yourself. Here is web site all about laser safety https://www.laserpointersafety.com/

Here is what eye damage happened member in less than a second form a 1W 445nm blue laser and no laser safety glasses: https://laserpointerforums.com/threads/hit-in-eye-with-1000mw-445nm-blue-laser.69469/
 
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