5pk Maxell Silver Oxide Watch Battery SR721W High Drain Replaces 361 The 361, or SR721W, is a rare Silver-Oxide cell normally used in watches, with a shelf life of 5+ years. Other applications may include calculators, film cameras, medical instruments, cash registers, or FA instruments (Measuring Instruments, Onboard Microcomputers, Sensors). This is a "W" high drain battery. 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. 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. Specifications Chemistry: Silver Oxide Voltage: 1.55V Capacity: 25mAh Diameter: 7.9 mm Height: 2.1 mm Includes 5 batteries Features High Drain - Best used with multi-function watches incorporating an alarm, illumination light, etc. A flat discharge curve during discharge supplies a stable voltage until the end of the discharge life High-energy density per unit volume provides 2x the amount of energy capacity as button-type alkaline batteries Featuring Maxell"s original leak-resistant processing Also Known As: 10 L 126/D 394, 1161SO, 280-17, 394, 394A, 625, AG9, D394, GP394, L936, LR936, R 394/27, RW 335, RW33, S33, S936S, SB-A4, SG9, SP394, SR 45, SR 936 SW, SR45, SR45H, SR936, SR936SW, V394, W33 Need more than one? We offer great discounts on quantity orders and FREE SHIPPING offers available. SpecificationsBrand: Maxell Output Voltage: 1.55V Amperage: 25mAh Chemistry: Silver Oxide Battery Size: 361 / 362 Height: 2.1mm Diameter: 7.9mm Country of Manufacture: Japan Compatibility Alba: W410, Y661, Y662 Berc: BSR58L Bulova: 601 Casio: 2852