As a compact and lightweight battery, the Maxell 362 SR721SW is a silver oxide button battery that will impress. Like all silver oxide batteries, the Maxell 362 is perfectly suited towards smaller household applications like watches, calculators, and electronic toys, or for important medical equipment like glucometers and heart-rate monitors. Additionally, the Maxell 362 SR721SW utilizes a stable output voltage and low drain currents that ensure this battery's longevity.