Thanks for the links ZapU, I will see if I can track down one of those batteries in the UK.
denodan, why do I run the risk of damaging my Arctic? I am genuinely asking as I don't know enough about these things and don't want to damage it.
bbshamsa, yea good idea about the o-ring. To be honest though it's not a major problem, the cap is pretty much screwed on, there is just a 1 mm gap but yea it would be better flush.
The only risk of damage is because the battery is longer, you run the risk of tighting it up to much damaging contacts and battery.
I sent my Arctic back, it broke down after 4 days, they are going to replace it, but since I also have the Spartan, it's miles better, far better quality, metered over 1 watt, far better cleaner retanglar dot, burns much better, and QC is exellent, unlike the Arctic, it's crap quality, and many have problems are faulty or malfuction after only a few days. Don't hear problems with the Spartan.
The only thing the Arctic has got is a cool host, but what's the point of a cool host when it has QC problems and many malfucting Arctics.
The Spartan has an uncool host, that looks like a small touch, but great laser, and great QC, whereas the Arctic is the other way around, crap. I love my Spartan and glad I got it.
My Crap Arctic crapped out after 4 days, since I paid for it, would rather have a replacment as it is nice owning both.
Also I did manage test the Glasses from Dragon lasers which I got with the Spartan, and glasses work well, even well on green lasers.
Before I sent my Arctic played up, tried the Spartan out on my WL glasses and was far too bright.
Just hope I get a Good Arctic this time? If I do, will enjoy both lasers.