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  4. CR1220 3V Lithium Coin Cell with Solder Tabs for PCB Mount CMOS RTC Battery
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CR1220 3V Lithium Coin Cell with Solder Tabs for PCB Mount CMOS RTC Battery

CR1220 3V Lithium Coin Cell with Solder Tabs for PCB Mount CMOS RTC Battery

ComponentSpecification
ChemistryLithium Manganese Dioxide ($LiMn{O}_{2}$)
ModelCR1220
Nominal Voltage3.0V
Capacity~35mAh to 40mAh
Mounting TypeSolder Tabs (Vertical/Horizontal PCB Mount)
Diameter12.5 mm
Height2.0 mm
                                 Price

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₹ 42.37 ₹ 42.37
(Tax included)

Barcode: 96431

Product Description The CR1220 with Solder Tabs is a specialized 3V primary lithium battery designed for direct integration into printed circuit boards (PCBs). By featuring pre-welded nickel-plated solder tabs, this battery eliminates the need for bulky battery holders, ensuring a vibration-resistant and permanent power connection. It is the industry-standard choice for Real-Time Clock (RTC) backup, CMOS memory retention, and ultra-compact low-power medical or industrial sensors where space and reliability are critical.

Key Features

  • PCB Ready: Integrated solder tabs allow for quick and secure mounting directly onto electronic circuits.

  • Vibration Resistant: Welded tabs ensure a continuous connection even in high-movement or portable devices.

  • Long Shelf Life: Advanced lithium chemistry maintains over 90% capacity even after 5–10 years of storage.

  • High Energy Density: Delivers stable 3V output in an ultra-miniature 12.5mm diameter form factor.

  • Wide Temperature Range: Operates reliably in diverse environments from industrial machinery to outdoor sensors.

Technical Details

  • Standard Discharge Current: 0.1mA

  • Max Pulse Discharge: 5mA

  • Tab Material: Nickel-plated stainless steel

  • Weight: Approx. 0.8g to 1.2g

  • Self-Discharge Rate: < 1% per year

  • Operating Temperature: -20°C to +70°C

Prototyping and Engineering Tips from Robogears

  • Soldering Caution: Lithium batteries are extremely heat-sensitive. When soldering the tabs to your PCB, use a high-wattage iron (40W-60W) to complete the joint in under 2 seconds. Excessive heat can damage the internal seals, leading to leakage or reduced capacity.

  • Polarity Verification: Always check the PCB marking before installation. On these tabbed cells, the larger flat surface (top) is the Positive (+) terminal. Reversing the polarity in an RTC circuit can damage the clock chip or the battery itself.

  • No-Recharge Warning: This is a non-rechargeable primary cell. If your circuit is powered by an external source (like USB or a main battery), you must include a blocking diode (e.g., 1N4148) to prevent current from flowing back into the CR1220.

  • Cleaning: After soldering, ensure you clean any flux residue from around the battery terminals using Isopropyl Alcohol (IPA) to prevent micro-leaks or corrosion over long-term use.

Package Includes

  • 1 x CR1220 3V Lithium Coin Cell with Solder Tabs

Disclaimer Images are for reference; actual tab orientation (horizontal/vertical) may vary by batch. Specifications subject to change by manufacturer. Do not attempt to recharge, incinerate, or disassemble lithium cells.

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