5PK Maxell Silver Oxide SR721W High Drain Watch Battery Replaces 361, 394, 394A, 625, AG9, D394, GP394, R 394/27, RW 335, RW33, S33 The 361, or SR721W, is a rare Silver-Oxide cell normally used in watches, with a shelf life of 5+ years.
•••. This is in comparison to low drain batteries, which are best used in devices that use a small amount of power over a long time: Analog watches, TV remotes, alarm clocks, etc.Silver Oxide Watch Battery SR721W High Drain Replace 361 SR58, PK 5 Other applications may include calculators, film cameras, medical instruments, cash registers, or FA instruments (Measuring Instruments, Onboard Microcomputers, Sensors).High Drain batteries are for applications with a continuous, low power consumption and occasional high peaks: Analog and digital watches with extra functions (backlight, alarm), pocket calculators, electronic games, cameras, etc.
