The CR1220 Lithium Manganese Dioxide Coin Cell Battery is an ultra-compact, non-rechargeable button cell designed to provide long-lasting standby power for low-drain electronic modules. The alpha-numeric “CR1220” designation explicitly defines its chemistry and standard physical footprint: 12.5 mm in diameter and 2.0 mm in thickness. Due to its tiny size, it is the primary choice for saving space on compact electronic boards, micro Real-Time Clock (RTC) modules, car key fobs, handheld medical devices, and tiny LED wearable gadgets.
- Ultra-Compact Footprint: Squeezes a 3.0V supply into a small 12.5mm frame, making it excellent for space-constrained electronics.Â
- Long Shelf Life Reliability: Retains up to 90% of its original capacity even after sitting on a shelf for 10 years due to its exceptionally low self-discharge rate.Â
- Stable Voltage Rail: Delivers a steady 3.0V output across nearly its entire operational discharge cycle, protecting sensitive microchips from under-voltage resets.
- Leak-Resistant Steel Shell: Encased in an anti-corrosion stainless steel casing that securely contains the lithium chemistry, protecting expensive circuit boards.

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