The LR43 is a small but powerful alkaline button cell battery that can be used to power a number of different devices, such as laser pointers, watches or cameras. The LR43 battery outputs 1.5 volts and measures approximately 11.6 by 4.2 millimeters.
Depending on where a customer live and the brand of battery he is looking for, the LR43 has a number of different equivalent replacements for different devices. Some batteries that could replace the LR43 are the AG12, G12, G12A or the V12GA. The LR43 and equivalents are sometimes substituted for use in devices requiring silver oxide 301 or 386 batteries because they are substantially cheaper.