This 10.5V, 150mAh S177 Silver Oxide Battery from Exell Battery is a Silver Oxide alternative to the Mercuric Oxide 7MR9 and H-7D cells, and has a higher output voltage than those cells. It serves as a replacement for the Eveready EN177S, Duracell PC177S, ANSI / NEDA-1606A, IEC-7LR44, and other batteries. The S177 can be used to power several Sony long shotgun-type condenser microphones, such as the C-76, as well as various other devices, including some vintage camera equipment and medical testing equipment. It is a little slimmer and a little shorter in length than a standard AA battery. The S177 is assembled in the USA.