Help cheap laser no batteries

[Zator]

I need some help. I bought this laser pointer online and it came with no batteries and doesn't tell me what kind of batteries to get the 18 650 seems to fit but it doesn't work it doesn't turn on I can't find 16340 anywhere and I don't know what to do it's a silver like aluminum looking case with rods going all around it and the button is on the bottom and it's got Allen key screws all around the top for those rods that run the length of the laser does anyone know what I'm talking about

 

[Encap]

Ask whomever sold it to you or look at the sellers link where it will say what battery---common sense.

$25 Gatling style host -- green, red, violet 1 X 18650-- blue 2X16340 negative side of battery towards front of laser--positive towards tailcap w. switch or you risk ruining the driver and laser diode
Look here :https://laserpointerstore.com/collections/laser-pointers/products/gatling-series-laser-pointer

 

[GSS]

Thanks Encap, I forgot about the proper polarity

 

[Snecho]

That is the infamous Gatling laser. I'm guessing it's a ~1W 445nm blue. It takes two 16340 batteries, positive end towards the tailcap button.

These are tested 16340 batteries I use myself and if you're in the US, it's the best site you can buy from: https://liionwholesale.com/collecti...800mah-battery-genuine?variant=28408751816798

Please be careful and buy a pair of genuine laser googles here: https://www.survivallaserusa.com/Ea...rd_Laser_Safety_Goggles/p1667092_7862033.aspx

They also have a slip-over version if you wear glasses.