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ML1220
ML1220
| Part Number | ML1220 |
|---|---|
| Manufacturer | Panasonic |
| Category | Batteries & Power Products > Rechargeable Batteries (Secondary Cells) – Coin / Button Cell |
| Description | Rechargeable Manganese Lithium Coin Cell Battery, 3.0V Nominal Voltage, 17~18mAh Capacity, Ultra-Compact 1220 Coin Cell Package, Wide Operating Temperature Range (-20°C to +60°C). |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The ML1220 is a compact rechargeable manganese lithium coin cell manufactured by Panasonic. Developed for miniature electronics and limited-space memory backup systems, this 3.0V secondary cell provides reliable cycling performance and great overcharge tolerance. With 12.5 mm × 2.0 mm 1220 coin cell package, it operates stably from -20°C to +60°C, suitable for RTC, memory retention, keyless devices, IoT nodes and mini medical sensors.
Core Advantages
Compact Form Factor & High Energy Density
12.5 mm diameter × 2.0 mm thickness, saving space for miniaturized electronic products.
Long Lifespan & Excellent Overcharge Resistance
Stable performance under continuous trickle charging, no memory effect and low capacity attenuation.
Stable 3.0V Output Voltage
Consistent discharge voltage matching 3V MCU circuits, simplifying power circuit design.
High Sealing Performance & Low Self-Discharge
Adopts Panasonic crimp sealing technology to reduce electrolyte loss, ensuring long-term backup power supply.
Key Specifications
| Brand | Panasonic |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free / Mercury-Free |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | Coin Cell 1220 (12.5 mm Diameter × 2.0 mm Height) |
| Mounting Type | Coin Cell Holder / PCB Tab Pin Solder Mount |
| Surface Marking / Silkscreen | Panasonic ML1220 Marking |
| Battery Chemistry | Rechargeable Manganese Lithium (ML) |
| Nominal Voltage | 3.0 V (Typical operating voltage: 2.5V ~ 2.8V) |
| Charging Voltage | 2.8V to 3.2V (Standard 3.0V to 3.1V) |
| Nominal Capacity | 17 ~ 18 mAh |
| Standard Continuous Discharge Current | 0.03 mA |
| Cycle Life | ≥1000 cycles (10% depth of discharge) |
| Self-discharge Rate | ≤2% per year at 20°C |
| Operating Temperature Range | -20°C to +60°C |
| Weight | Approx. 0.8 g |
| Packaging Format | Tray / Blister Pack / Bulk |
Precautions
- Charging Voltage Control: Keep charging voltage between 2.8V and 3.2V. Overcharging over 3.3V will lead to permanent capacity loss and internal battery damage.
- Avoid External Short-Circuits: Shorting positive and negative terminals produces high surge current, causing overheating and shortening battery service life.
- Do Not Solder Directly To Cell Body: High temperature will destroy internal seals. Please use pre-welded tabs or dedicated coin cell holders for installation.
- Observe Correct Polarity: Confirm positive (+) and negative (-) orientation during installation to prevent reverse charging.
- Do Not Heat Or Disassemble: Do not expose battery to temperatures higher than 85°C. Never burn, open or deform the battery casing.
Typical Applications
- Real-Time Clock (RTC) and SRAM memory backup in smart utility meters, laptops, and hand-held terminals
- Automotive keyless entry remotes, tire pressure monitoring systems (TPMS), and smart car keys
- Miniature medical monitoring devices, hearing aids, and wearable healthcare sensors
- Smart home IoT sensors, security alarm systems, and Bluetooth beacon tags
- Compact solar-powered electronic devices, digital clocks, and industrial controllers
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS, YFH Standard |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, bulk pricing and custom versions with solder tabs, pins and wire assemblies, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: What is the main difference between Panasonic CR1220 and ML1220?
A1: CR1220 is non-rechargeable primary battery (3.0V, ~35mAh). ML1220 is rechargeable manganese lithium secondary cell (3.0V,17~18mAh) designed for repeated charge/discharge backup power supply.
Q2: Can I directly replace non-rechargeable CR1220 with ML1220?
A2: Yes in physical size. But your PCB must have a matched charging circuit (2.8V~3.2V). Without charging circuit, ML1220 only works as disposable power source and cannot be recharged.
Q3: Are custom solder tabs and wire leads available for ML1220?
A3: Yes. We supply Panasonic ML1220 with vertical, horizontal, 2-pin /3-pin solder tabs, insulated wire leads and connector assemblies.
Q4: What charging circuit is recommended for ML1220?
A4: Adopt constant-voltage charging circuit, set output 3.0V ~ 3.1V, add current-limiting resistor to restrict surge current and avoid overcharge damage.
Q5: What alternative rechargeable coin cells are compatible with ML1220 footprint?
A5: Compatible form factor alternatives include Maxell ML1220, FDK ML1220. Attention: Different brands have slight difference in internal resistance and cycle life, verify charging parameters before mass replacement.
Q6: How many charge cycles can ML1220 support?
A6: ≥1000 cycles under 10% depth of discharge. Deep discharge will greatly shorten the service life of the battery.
Q7: What are the risks of improper use for ML1220?
A7: ⚠️ Danger Warning: Overcharging above 3.3V, short-circuit, heating over 85°C, disassembly or burning may cause swelling, leakage, fire or explosion. Strictly follow our specification and precautions.
Q8: What is the self-discharge performance of ML1220?
A8: Self-discharge rate ≤2% per year under 20°C environment, excellent for long-term RTC memory backup equipment.
Q9: Can ML1220 work continuously at extreme low temperature?
A9: Standard operating range: -20°C ~ +60°C. Capacity will drop obviously below -20°C, not recommended for long-term low-temperature outdoor equipment.
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