Maxell battery 371 SR920SW

Maxell 371 (SR920SW) is a premium silver oxide button cell battery manufactured in Japan. It is engineered for precision electronic devices that require a stable voltage and a long service life. As a "Low Drain" battery, it is the standard choice for high-quality quartz watches and small electronic instruments.


SR920SW / 371.
Voltage: 1.55 V.
Nominal Capacity: 40–45 mAh (discharged to 1.2 V).
Dimensions: 9.5 mm (diameter) x 2.05 mm (height).
Type: Low Drain (SW) – optimized for continuous, low-power consumption.
Chemistry: Silver Oxide (Zinc Silver Oxide), 0% Mercury (Hg Free).
Nominal Discharge Current: Approx. 50 µA.
Test Load Resistance: 30 kΩ.



Precision Made in Japan: Manufactured by Maxell to the highest quality standards, ensuring consistent dimensions and reliability.
Superior Leak Resistance: Features Maxell’s original leak-resistant processing to protect sensitive watch movements from electrolyte seepage.
Flat Discharge Curve: Provides a constant 1.55V output, ensuring your device maintains accurate performance until the battery is nearly empty.
Produced without added mercury or lead, fully complying with global environmental regulations.

Compatibility & Equivalents:

371 (Energizer, Renata, Varta, Duracell)
SR920SW (IEC Standard)
V371 / D371
SR69
SB-AN (Seiko) / 280-31 (Citizen)

Analog quartz watches, calculators, laser pointers, and medical devices.