I just noticed some rechargeable CR123 batteries on ehobby. There are two of them, a 3V one and a 3.6V one:
http://cgi.ebay.com/UltraFire-3V-CR1...QQcmdZViewItem
http://cgi.ebay.com/UltraFire-3-6V-C...QQcmdZViewItem
Now, a regular CR123A has anywhere from 1300 to 1600 mAh. These have 800 and 880, so probably only last half as long. The big question though, I have a P91 lamp in my G2/9P amalgam, and was wondering how the lamp would react to the higher voltage from the 3.6V batteries. The 3.6V rechargeables are both cheaper and higher capacity than the 3V one, so if it won't burn my lamp, I'd definitely take those instead.