Varta 391 1.55V Silver Oxide Battery - 1 Pack 

Product Description

The Varta V391 is a high-performance 1.55V primary silver oxide button cell battery engineered for watches with digital displays, alarms, backlights, and high-drain movements. Built with potassium hydroxide (KOH) electrolyte technology and a leak-resistant seal, it delivers robust energy density and consistent power delivery for digital-analog wristwatches, calculators, keyless remotes, and medical instruments.

Key Features

• High-Drain Performance: Engineered to handle continuous power demands and sudden energy surges from alarms or backlights.
• Stable 1.55V Output: Maintains flat discharge voltage characteristics for reliable quartz movement timekeeping.
• Standard Dimensions: Measures 11.6mm in diameter by 2.1mm in height (SR1120W / SR55 / 391 standard).
• 42mAh Nominal Capacity: Delivers high energy capacity in a compact coin cell design.
• Universal Cross-Reference: Directly replaces 391, V391, SR1120W, SR1121W, SR55, D391, 280-30, SB-BS, and RW40.

Specification

Model: 391
Chemistry: Silver Oxide
Voltage: 1.55 Volt