A battery charging system comprising: a current source; a battery; and a voltage and current regulator, which regulates voltage applied to the battery and current supplied to the battery. More specifically, a system and method for retrofitting existing utility meters with a lightweight tape, having contrasting sections of reflective and non-reflective material applied thereto, which is read by optical sensors as the lightweight tape passes by with the revolutions of the disk of the utility meter. The xFIFO engine receives a FIFO command from the register bus and generates a writing DMA command and a reading DMA command. In an embodiment, metal product is used in fabricating at least a portion of an aircraft.