Order 16340
batteries and a charger from BatteryJunction.com - they're in Connecticut. I ordered them one evening, they shipped via USPS the following day.
What I ordered was the following:
Kit: 2 x RCR123A 3.6V 880mah Ultrafire Protected Li-Ion
batteries & TL-100 Universal Li-Ion Charger 16340
It's confusing because they refer to them as RCR123A and they refer to them as 16340. I bought this kit with 2 additional batteries, and all 4 batteries say 16340, so I'm sure I have the right batteries. It came with the charger, too.
The text on their web site shows:
The Ultrafire 16340 batteries are a replacement for standard CR123A batteries in many applications. Sometimes called an RCr123A or Rechargeable CR123A some caution must be excercised as these cells are 3.6V, not 3.0V as is a standard CR123A and these cells are also about 1mm longer than is standard so if you're using 2 in series you need to be aware that they'll be 2mm longer in total and outputing 7.2V(8.4 peak). These are the right choice if your using them in an LED flashlight known to fit this type of cell - otherwise we recommend our Tenergy cells linked below.
* Rechargeable CR123A Li-Ion Batteries with 3.6V working voltage and advertised 880mAh capacity.
* Can be recharged up to 500 times.
* PCB protection against: Over-Discharge, Over-Charge & Short Circuit.
* Dimensions: 36 mm Height x 17 mm Diameter (+/- 0.5 mm)