CR2450
Direct Answer
A CR2450 coin cell is a 3.0V Lithium Manganese Dioxide battery measuring 24.5mm in diameter and 5.0mm in thickness, with a nominal capacity of about 610 mAh -- among the largest standard coin cells. It's commonly used in larger remote controls, TPMS sensors, and medical alert devices needing extended runtime.
Source: IEC 60086-3
Specs
| Diameter | 24.50 mm |
| Height | 5.00 mm |
| Nominal Voltage | 3.00 V |
| Nominal Capacity | 610 mAh |
| Chemistry | Lithium Manganese Dioxide |
The Largest Common Coin Cell Format
The CR2450 sits at the large end of the standard lithium coin cell range: 24.5mm in diameter and 5.0mm thick, giving it substantially more internal volume than a CR2032. That extra volume translates directly into capacity -- around 610mAh, nearly triple the CR2032's 225mAh -- while retaining the same flat 3.0V output and low self-discharge rate that make lithium manganese dioxide cells attractive for long-running applications.
Because of its size, the CR2450 is sometimes confused with other large-format coin cells in the same 24.5mm-diameter family, such as the thicker, higher-capacity CR2477 and the thinner CR2430 -- all follow the same IEC 60086-3 naming logic, where the diameter stays fixed at 24.5mm and the trailing digits encode thickness and, indirectly, capacity.
Typical Uses
The CR2450's higher capacity suits devices that need more runtime than a CR2032 or CR2025 can provide but still require a compact, coin-shaped cell rather than a cylindrical one: larger remote controls, tire-pressure monitoring system (TPMS) sensors, medical alert pendants, point-of-sale terminals, and LED candles or lanterns designed for weeks of continuous use are common applications. As with other coin cells, it should be kept out of reach of children given the serious chemical-burn risk if swallowed and lodged in the esophagus.