Button/coin single-use battery Varta V393 — Silver‑Oxide 1.55V, Ø7.9×5.4 mm

Varta V393 is a single-use button/coin cell battery that uses silver‑oxide chemistry to provide a stable nominal voltage of 1.55 V in a compact package. With dimensions of 7.9 mm in diameter and 5.4 mm in height, this cell is designed for small electronic devices that demand reliable, consistent power output over their service life. The silver‑oxide chemistry delivers good performance under low-drain constant loads and maintains voltage stability compared with alkaline alternatives.

Advantages

The Varta V393 offers stable voltage delivery throughout most of its discharge cycle, compact size for space-constrained designs, and compatibility with devices that require small, high-energy-density cells. Silver‑oxide construction reduces self-discharge and provides predictable end-of-life behavior, which is important for timekeeping and precision electronics.

Suitable for

• Wristwatches and timepieces
• Calculators and small portable electronics
• Key fobs and remote controls
• Medical devices such as glucose meters and hearing devices (where specified by manufacturer)
• Small sensors and measuring instruments

Key specifications

• Chemistry: silver‑oxide (Ag2O)
• Nominal voltage: 1.55 V
• Diameter: 7.9 mm
• Height/thickness: 5.4 mm
• Cell type: single-use (primary) button/coin cell
• Designed for low to moderate drain applications requiring stable voltage

How to use

Install the Varta V393 cell in the device following the manufacturer’s polarity markings, ensuring the correct orientation of the positive and negative terminals. Avoid forcing the cell into a compartment; it should fit snugly without excessive pressure. Do not attempt to recharge the cell. Replace the cell when device performance or displayed indicators show reduced power. Dispose of used cells in accordance with local battery recycling and disposal regulations.

Usage recommendations

Store unused cells in a cool, dry place and avoid exposure to high temperatures or humidity. When replacing batteries in precision devices such as watches or medical equipment, use identical cell type and chemistry to ensure correct operation and to maintain accuracy.