Maxell 363 (SR621W) 1.55V Silver Oxide Battery – High-Drain Button Cell
The Maxell 363 (SR621W) is a premium high-drain silver oxide button cell designed for precision electronics that require dependable power during occasional high-demand bursts. It delivers a stable 1.55V output, making it a reliable choice for multi-function watches and specialized devices such as medical instruments. Ideal for watches with features like alarms, backlights, or other power-peak functions, the SR621W chemistry helps maintain consistent performance and accurate operation.
Key Features
Brand: Maxell
Model / Equivalent: 363 / SR621W
Voltage: 1.55V
Chemistry: Silver Oxide (high-drain “W” type for power peaks)
Best For: Multi-function watches, medical instruments, and precision electronics
Performance: Stable voltage output, reliable runtime, designed for peak power demands (alarms/backlight)
Compatibility Note
Please confirm your device requires 363 / SR621W (match the code on your existing battery or your device manual) before purchase.
