Replacement Battery for Citizen Eco-Drive Watches –

Product Overview

This replacement battery is specifically engineered for Citizen Eco-Drive watches that utilize the 295-5100 (MT621) sealed capacitor. Designed to meet the exact performance and dimensional standards of the original component, it provides a dependable power source for restoring functionality in watches that have stopped charging or holding a charge. Ideal for both watch owners and professional repair technicians, this capacitor ensures your Eco-Drive timepiece continues to operate with precision and reliability. Whether you’re addressing a complete power loss or performing preventive maintenance, this replacement offers a straightforward solution with minimal downtime. Its design preserves the integrity of your watch’s internal mechanisms, supporting long-term accuracy and performance without the need for frequent servicing.

Key Features

• Exact Fit for Citizen Eco-Drive Models: This 295-5100 (MT621) battery is precision-engineered for compatibility with a wide range of Citizen Eco-Drive watches. Confirm fitment by checking your watch’s back case model number—compatible with 5700, A100, B110, B117, BP10, E000, E001, E010, and numerous other models. Its dimensions—6.8 mm in diameter and 2.1 mm in height—match the original specifications for seamless installation without modification or adjustment.
• Premium Safety and Reliability: Constructed with certified lithium-polymer technology, this Grade A+ capacitor is designed to prevent overcharging, overheating, and short circuits. The leak-proof construction ensures safe operation under normal conditions and maintains stable performance across varying temperatures, protecting both the battery and your watch’s internal mechanisms from potential damage due to electrical irregularities.
• Extended Charge Retention: Thanks to advanced capacitor engineering, this battery retains a charge for up to 24 months or more under typical usage conditions. Each unit is sealed in protective packaging immediately after manufacturing to preserve freshness and ensure it arrives in optimal working condition, ready for immediate use.
• Simple Reactivation Process: If your watch enters sleep mode after prolonged darkness, simply expose it to strong light—such as direct sunlight—for 4 to 6 hours to restore normal function. For ongoing performance, regular light exposure of 2 to 3 hours per week is recommended. Avoid storing the watch in dark environments for extended periods, as this can deplete the charge and require longer reactivation times.
• User-Friendly Support: Dedicated customer assistance is available before and after purchase. Whether you have questions about compatibility, installation, or performance, support is accessible to ensure a smooth experience and complete satisfaction. Our team is committed to helping you make the right choice and resolve any concerns promptly.

Technical Specifications

• Battery Model: 295-5100 (MT621)
• Type: Sealed lithium-polymer capacitor
• Diameter: 6.8 mm
• Height: 2.1 mm
• Compatible Watch Models: 5700, A100, B110, B117, BP10, E000, E001, E010, and others (verify via back case model number)
• Charge Retention: Up to 24+ months
• Packaging: Individually sealed for freshness

Benefits & Use Cases

This replacement capacitor is ideal for restoring functionality to Citizen Eco-Drive watches that no longer hold a charge or have stopped working due to a depleted power cell. It’s particularly useful for owners who rely on solar-powered timekeeping and want to avoid sending their watch to a service center for a simple battery change. Watch repair technicians can also use this component for quick, reliable replacements during routine maintenance or refurbishment projects, reducing turnaround time for customers.

Because the battery is designed to exact OEM specifications, it ensures consistent power delivery, which helps maintain the watch’s accuracy and prevents potential damage from incompatible or low-quality substitutes. The stable voltage output supports the proper functioning of the movement, minimizing the risk of timing errors or malfunctions. Regular light exposure after installation ensures long-term performance, making it suitable for daily wear in various lighting conditions, from office environments to outdoor activities.

Important Notes

Before installation, always verify compatibility by checking the model number on the back of your watch. When replacing the battery, exercise care to avoid dislodging the battery contact on the back of the movement, as this can affect functionality and may require additional repair. This product does not include tools or step-by-step installation instructions—professional handling is recommended for users unfamiliar with watch repair. For optimal results, avoid storing the watch in dark places for extended periods, and recharge it under strong light as needed. Following these guidelines will help maximize the lifespan and performance of both the battery and your timepiece.