Portable welding-type apparatus with interchangeable energy storage device

The present invention is directed to a portable welding-type power source (10) including a removable energy storage device (26) configured to provide a first voltage output and a boost circuit (36) connected to the energy storage device (26) and configured to boost the first voltage output to a second voltage output to supply power to the welding-type power source according to a selected welding-type process.