Alternative Battery For Panasonic ML-621S/ZTN - Seiko MS621FE 3v, 5mah - 0.015wh
MS621FE Rechargeable Lithium Coin Cell Battery 3V 5.5mAh
Ultra-compact rechargeable lithium coin cell designed for RTC backup, CMOS memory retention, IoT devices, industrial sensors, and other low-current electronic applications requiring reliable 3V backup power in a miniature footprint.
Technical Specifications
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Why Choose This Product
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- Rechargeable lithium chemistry for extended service life.
- Stable 3V output suitable for sensitive electronic circuits.
- Ultra-compact design for space-constrained PCB layouts.
- Excellent cycle performance with up to 1000 cycles at 20% depth of discharge.
- Ideal for applications where battery replacement is difficult or inconvenient.
- Optimized for low-current backup and memory retention functions.
Compatible Part Numbers
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Typical Applications
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- Real-Time Clock (RTC) backup systems
- CMOS and memory retention circuits
- Wearable electronics
- Compact consumer electronic devices
- Industrial sensors
- Embedded electronic systems
- IoT devices requiring rechargeable backup power
Product Highlights
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- 3V rechargeable lithium coin cell battery.
- 5.5mAh nominal capacity.
- Compact Ø6.8mm × 2.1mm footprint.
- Low-current operation for backup and retention applications.
- Lightweight design at only 0.23g.
- Pressure contact termination style.
- Designed for long-term backup power use.
FAQs
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Is the MS621FE rechargeable?
Yes. The MS621FE uses rechargeable lithium chemistry and is designed for repeated charge and discharge cycles.
Can it replace a CR-series coin cell?
No. MS-series batteries are rechargeable and are not direct replacements for non-rechargeable CR coin cells. Always verify device requirements before installation.
What charging voltage should be used?
The recommended charging voltage range is 2.8V to 3.3V, with 3.1V being typical.
What size is this battery?
The battery measures 6.8mm in diameter and 2.1mm in height.
Important Compatibility Information
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Confirm chemistry, charging circuit compatibility, and physical dimensions before purchase. The MS621FE is a rechargeable lithium coin cell and should not be substituted for a primary (non-rechargeable) coin cell unless the device is specifically designed for rechargeable battery operation.
Verify that the Ø6.8mm × 2.1mm dimensions match your battery holder or PCB layout and always use the recommended charging voltage range of 2.8V to 3.3V.
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🔋 What’s mAh All About?
🔋 What’s mAh All About?
mAh stands for milliamp hours—basically, how much "fuel" your battery can hold. A higher or lower mAh than your original battery? No worries! 🙌 It won’t affect charging or operation—just means your device might run a bit longer or shorter between charges. Still 100% compatible. Still 100% awesome. 💪✨
Before ordering please read
Before ordering please read
Ensure the original battery model number is mentioned in our product description and verify that your device model number is also listed in the description.
How to Look after your new lithium battery!!
How to Look after your new lithium battery!!
See how to look after your battery if its lithium Lithium Care
Delivery and Shipping
Delivery and Shipping
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