Lithium Coin Cell Battery Panasonic VL2020 3V 20mAh

Panasonic VL2020 is a 3V lithium coin cell battery with a nominal capacity of 20mAh designed for compact electronic devices. It delivers a stable output voltage and long shelf life, making it suitable for low-current applications that require reliable backup power or sustained operation in a very small form factor. The battery's compact dimensions and light weight allow integration into watches, small sensors, calculators, key fobs and memory-retention circuits where space is limited.

Advantages

The battery provides a consistent 3V output across typical low-drain usage, with long storage life and low self-discharge that helps preserve charge until needed. Its small diameter and thin profile enable installation in tight compartments; the construction offers reliable contact and stable performance over extended standby periods. Panasonic manufacturing standards ensure uniform sizing and quality control for predictable replacement and interchangeability in compatible devices.

Suitable for

• Wristwatches and small timepieces
• Key fobs and remote controls with low current draw
• Memory backup for electronic modules and RTC (real-time clocks)
• Calculators, small sensors and medical devices with low power requirements

Key specifications

• Chemistry: Lithium manganese dioxide (3V nominal)
• Rated capacity: 20 mAh (nominal)
• Nominal voltage: 3.0 V
• Cell type: Coin / button cell
• Operating temperature range: typical room-temperature performance, suitable for low-drain applications
• Low self-discharge for long shelf life
• Compact diameter and thickness for space-limited devices

How to use

Install the coin cell with correct polarity as indicated in the device battery compartment. Verify the cell orientation before closing the cover to ensure correct operation and to avoid damage. Replace the battery when device performance becomes unreliable or when backup memory indicators suggest low voltage. Dispose of used cells according to local battery recycling and hazardous-waste regulations; do not incinerate or expose to high temperatures. For devices with multiple cells or specialized holders, follow the device manufacturer's installation guidelines.

Recommendations

Store unused cells in a cool, dry place away from direct heat and metal objects that could short the terminals. For prolonged storage, keep the battery in original packaging until installation. Use the VL2020 in low-drain and memory-backup applications as intended; avoid high-drain applications or continuous high-current discharge which can significantly reduce effective capacity and service life.