Varta Silver Oxide Button Cell Battery - SR63, SR521

These are industry standard designations for button cell batteries, indicating their size (diameter and height) and chemistry (Silver-Oxide).

No, the Varta V379 is a single-use (primary) battery and is not designed to be recharged. Attempting to recharge it can be dangerous and damage the device.

The lifespan depends on the device's power consumption. For a typical watch, it can last 1-3 years. For calculators or other devices used intermittently, it may last longer.

1.55V is standard for silver-oxide button cells. Other button cells may have different voltages (e.g., 1.5V alkaline or 3V lithium) and are not interchangeable.

Silver-oxide batteries should be disposed of responsibly. Check with your local waste management authority for battery recycling or disposal guidelines. Do not dispose of them in regular household trash.

mAh stands for milliampere-hour, which is a measure of electric charge capacity. A higher mAh generally indicates a battery can supply current for a longer time.

Ensure the battery is inserted with the correct polarity (+/-). Check that the battery contacts in the device are clean and making proper contact. Try a different Varta V379 battery if available.

The battery may be low or faulty. Replace with a fresh Varta V379 battery. Ensure the battery is fully seated and the device's contacts are clean.

Immediately remove the battery from the device using appropriate tools (gloves recommended). Clean any residue from the battery compartment with a dry cloth or eraser. Dispose of the leaking battery properly and replace it.