A dead battery can turn a working device into a very expensive paperweight. That’s particularly true when the battery isn’t a standard AA or AAA that you can pick up almost anywhere. The CR123A is one of those specialty lithium batteries. It has a cylindrical design, a 3-volt nominal output, and a reputation for providing dependable power in equipment ranging from medical devices to security and professional electronics. MicroBattery lists CR123A cells with a nominal voltage of about 3.2–3.3 volts, approximately 1,550 mAh capacity, and dimensions of about 34.2 mm in height by 17 mm in diameter. If you\'re planning to Shop CR123A Batteries Online Today, the key isn\'t simply finding the lowest price. You need to know whether you\'re buying the correct chemistry, whether the supplier has appropriate inventory, and whether the battery matches the requirements of your device.