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I'd stay away from those batteries, they are not good quality. i had some that couldn't handle the current draw of my 532 laser and it killed them, they almost exploded, got really hot. the claim of 2000mAh is also false. the highest true capacity in that size will not be over 900mAh, and probably closer to 750mAh.
here are two choices I'd go with over the ones you've found:
AW RCR123a Protected 750 mAh Battery
AW IMR 18350 700mAh LiMN Rechargeable Lithium Battery
the second ones I linked to can be discharged at a high rate, great for high power DPSS lasers. I should mention the second ones I linked to are also slightly wider (2mm) and just a tad longer (1mm), so if the laser you'll need them for has a little breathing room in the battery compartment they will fit, but if the 16340 batteries barely fit, then these will not
All of my previous links are no longer valid, as they were parts of the old receipts. These are the new ones I've chosen --- 4 UltraFire 16340 CR123A Rechargeable Li ion Battery 3 7V 1000mAh | eBay