Maxell 391 SR1120W 1.55V Silver Oxide Battery - 5 Pack

Product Description

Keep your watches and electronic instruments operating with exact precision using the Maxell 391 (SR1120W) 1.55V Silver Oxide Button Cell Battery. Engineered and manufactured in Japan, this high-drain button cell provides high energy density, superior voltage stability, and long-lasting durability.

The "W" designation in SR1120W highlights its high-drain capability. Designed to support devices with variable power needs, the Maxell 391 easily handles continuous power draws along with sudden power spikes required by watch alarms, chronographs, LED indicators, calculators, and clinical thermometers.

Maxell’s specialized seal structure suppresses electrolyte seepage, giving you peace of mind when installing it in expensive timepieces or delicate tools. Formulated without added mercury, it delivers high reliability in a compact 11.6mm x 2.05mm form factor.

Key Features

• HIGH-DRAIN POWER (SR1120W): Specifically engineered for high-drain electronic devices that require steady continuous power along with periodic high-current demands, such as watch backlights, alarms, and digital displays.
• STABLE 1.55V OUTPUT: Uses premium Silver Oxide chemistry (Ag2O/Zn) to provide a flat discharge voltage curve, maintaining consistent voltage output throughout the entire lifespan of the battery.
• LEAK-RESISTANT CONSTRUCTION: Manufactured in Japan with Maxell's precision sealing technology, effectively preventing electrolyte leakage to protect valuable precision equipment and micro-electronics.
• MERCURY-FREE FORMULA: Eco-friendly 0% Mercury (Hg-Free) design meets global safety standards while offering exceptional energy density and a low self-discharge rate for long shelf life.
• WIDE COMPATIBILITY: Direct replacement for 391, SR1120W, SR1120, D391, V391, 609, SB-BS/ES, and LR1120 / AG8 (alkaline equivalent). Ideal for wristwatches, digital calculators, medical devices, and light meters.

Specification

Model: 391 / SR1120W
Battery Type: Silver Oxide 
Voltage: 1.55 Volt