Button cell battery everActive CR2477 lithium 3V — pack of 5

everActive CR2477 lithium button cell battery, 3V nominal voltage, sold as a pack of five cells. These button cells are designed for compact electronic devices requiring a stable low-voltage source over long storage and intermittent use. The pack provides spare units for replacements in devices like watches, calculators, key fobs, medical monitors and systems that need memory backup power.

Advantages

The everActive CR2477 delivers steady 3V output and a long shelf life typical of lithium chemistry, which helps maintain reliable performance in low-drain and standby applications. The pack format of five batteries simplifies maintenance and reduces the need for frequent repurchase. Each cell is compact and lightweight, enabling use in space-constrained housings while providing consistent voltage until end of discharge.

Suitable for

• Wrist and pocket watches
• Calculators and small electronic toys
• Remote key fobs and security transmitters
• Medical devices requiring backup power (e.g., glucose meters, hearing devices where applicable)
• Memory backup in electronic instruments and data loggers

Key specifications

• Chemistry: Lithium (Li)
• Nominal voltage: 3 V
• Cell type: Button / coin cell
• Standard diameter and thickness category consistent with CR2477 dimensions
• Pack quantity: 5 cells
• Suitable for low-drain and intermittent-use applications

How to use

Before installation, check device documentation for compatible cell dimensions and polarity. Install the CR2477 with correct orientation, ensuring the positive (+) and negative (−) terminals align with the device contacts. Replace cells one at a time where continuous power from another cell or external source is required to preserve device settings. Dispose of used lithium cells according to local regulations and recycling guidelines; do not incinerate.

Usage recommendations

Store unused cells in a cool, dry place away from direct sunlight and metal objects to avoid short circuits. Avoid mixing new and used batteries or different brands in the same device. For devices critical to health or safety, verify compatibility and consult device manufacturer guidance before use.