Varta Silver oxide watch battery V392 / SR41W 1.55 V

The Varta V392, also known internationally as SR41W, is a universal premium silver oxide button cell for a variety of small electronic devices. As a "high drain" type, it was specially developed by Varta for applications requiring high energy for a short time. With its extremely stable voltage of 1.55 V, it is the first choice for precision instruments such as digital thermometers, where maximum accuracy is essential, as well as for watches with additional functions.

Highlights at a Glance

• Premium quality: High-quality silver oxide technology for demanding devices.
• High drain optimised: Ideal for devices with high, short-term energy needs.
• Stable voltage: Constant 1.55 V for precise measurement and reliable operation.
• Universally applicable: Perfect for watches, medical devices and calculators.
• Tested quality: High leak resistance and Varta reliability.

Powerful for a Wide Range of Applications

The Varta V392 is a versatile power source that goes far beyond use in watches. Its high and pulsed output makes it the ideal energy source for a broad spectrum of devices. It is used in digital thermometers, blood glucose meters, laser pointers, calculators, and wristwatches with functions such as illumination or alarms. Wherever high power is needed briefly in a compact format, the V392 is the right choice.

Reliable Silver Oxide Technology (High Drain)

Unlike cheaper alkaline batteries, the V392's silver oxide technology offers extremely stable voltage throughout its entire life cycle. This is especially important in measuring devices, as a drop in voltage can result in inaccuracies. The "high drain" version is also designed to handle high current spikes, such as those produced by the beep of a clinical thermometer, with no drop in performance.

Efficiency and Safety by Design

Varta batteries are subject to the strictest quality controls to ensure consistently high performance and maximum safety. The superior construction of the V392 cell provides reliable protection against leakage, thus protecting sensitive electronics from damage. The convenient individual packaging also keeps the cell safely protected from short circuits and external influences until used.
 

Characteristics

FAQs about the Varta V392 / SR41W button cell

What do the designations SR41W or 392 mean?

These are alternative designations for the same battery size. SR41W is the international IEC standard, with "S" standing for silver oxide, "R" for round, "41" for the dimensions (7.9 mm x 3.6 mm), and "W" for "High Drain". The 392 is the manufacturer Varta's specific type number.

What is the difference to an LR41 or AG3 battery?

The main difference is in the cell chemistry and voltage stability. The V392 (SR41W) is a silver oxide battery with a very stable voltage of 1.55 V. LR41 and AG3 are alkaline batteries and their voltage drops much more under load and during discharge. For precision measuring devices such as a digital thermometer, a silver oxide battery is therefore explicitly recommended to avoid measurement errors.

What does "High Drain" mean for this battery type?

"High Drain" means that the battery is designed for high current consumption. It can deliver high power for brief periods without the voltage dropping. This is necessary for devices that perform functions such as beeps, an LED light or other power-intensive actions.

How must this button cell be disposed of?

Button cells must not be disposed of with household waste. Please take the empty cell to the designated collection points in stores or municipal recycling centres to ensure environmentally responsible processing.