CR2477 vs CR2450 Batteries: Differences, 1000mAh vs 600mAh Capacity & Compatibility

CR2477 vs CR2450 3V Lithium Coin Cell Comparison - 7.7mm vs 5.0mm Thickness Difference
Quick Answer Are CR2477 and CR2450 Batteries Interchangeable?

No, CR2477 and CR2450 batteries cannot be interchanged. Although both share an identical 24.5 mm diameter and supply 3.0 volts of lithium power, the CR2477 is significantly thicker and stores nearly twice the energy:

  • CR2477 is 7.7 mm thick with a massive ~1,000 mAh capacity (the thickest standard coin cell made).
  • CR2450 is 5.0 mm thick with a ~540–620 mAh capacity.
🇸🇬 In stock in Singapore with Fast Local Dispatch — order the exact cell your device requires:

The 2.7 mm thickness difference makes them physically incompatible: a CR2477 will not fit inside a CR2450 slot and forcing it will break retention latches and waterproof gaskets, while a CR2450 placed in a CR2477 compartment will rattle and fail to make electrical contact.

Within the 24 mm lithium coin cell family, the CR2450 and CR2477 represent the two "heavyweight" options. Both are engineered for power-hungry devices that require multi-year continuous operation, such as smart home sensors, automotive key fobs, and industrial BLE asset beacons. However, their physical geometry and capacity ratings serve very different hardware designs. Below is our complete comparison guide to help you choose the right replacement.

1. The 24 mm Heavyweight Family: CR2477 vs. CR2450 IEC 60086-3

According to international IEC standards, both cells are classified as round lithium manganese dioxide (Li/MnO₂) cells with a 24 mm nominal diameter (24.5 mm actual):

CR 24 77 (The Giant)
  • C: Lithium Manganese Dioxide (3.0 V)
  • R: Round / Coin cell shape
  • 24: 24.5 mm outer diameter
  • 77: 7.7 mm thickness
  • Capacity: ~1,000 mAh (1.0 Amp-hour)
CR 24 50 (The Workhorse)
  • C: Lithium Manganese Dioxide (3.0 V)
  • R: Round / Coin cell shape
  • 24: 24.5 mm outer diameter
  • 50: 5.0 mm thickness
  • Capacity: ~540–620 mAh

Key Takeaway: While a standard CR2032 provides ~225 mAh, a CR2450 delivers roughly 2.5× that capacity (~600 mAh), and the monster CR2477 delivers over 4× the energy of a CR2032 (~1,000 mAh) in a single coin footprint.

6. Cross-Reference Chart: Equivalent Brand Codes

CR2477 Equivalents 7.7 mm / 1,000 mAh
  • Duracell: DL2477
  • Energizer: ECR2477
  • Renata: CR2477N (stepped rim profile)
  • Other Codes: BR2477, KCR2477, LM2477
CR2450 Equivalents 5.0 mm / 600 mAh
  • Duracell: DL2450
  • Energizer: ECR2450
  • ANSI / NEDA: 5029LC
  • Other Codes: BR2450, KCR2450, LM2450
Authentic In-Stock Singapore Inventory

Buy Genuine CR2477 & CR2450 Batteries in Singapore

DigiStoreSG stocks genuine, factory-fresh Panasonic CR2477 (from S$8.00 with Free Singapore Delivery included), Swiss-made Renata CR2477N, and Toshiba CR2450 coin cells with full 10-year shelf life and fast local dispatch.

FAQ Frequently Asked Questions: CR2477 vs CR2450

Why is the CR2477 so much thicker than the CR2450?

The CR2477 is 7.7 mm thick to accommodate double the cathode and anode material of standard coin cells, packing roughly 1,000 mAh of capacity—nearly four times the capacity of a standard CR2032.

Can I substitute a CR2450 into a device requiring a CR2477?

No. The 2.7 mm height difference will prevent the battery compartment spring contacts from making physical connection, causing the battery to rattle and fail to power your device.

What is the difference between CR2477 and Renata CR2477N?

Standard CR2477 batteries feature straight cylindrical edges. Renata CR2477N has a stepped rim shoulder around the negative casing, engineered exclusively for specific European/Swiss sensor brackets.