Varta -V390. Battery type: Single-use battery, Battery size(s): SR54, Battery technology: Silver-Oxide (S). Height: 3.05 mm, Diameter: 1.16 cm. Package width: 56 mm, Package depth: 7 mm, Package height: 65 mm. Battery form factor: Button/coin. Shipping (inner) case width: 6.9 cm, Shipping (inner) case length: 4.5 cm, Shipping (inner) case height: 5.9 cm
| Battery technology | Silver-Oxide (S) |
| Type of batteries | SR54 |
| Voltage (V) | 1.55 V |