CR1620
Button Cells · 4 specs
Direct Answer
A CR1620 coin cell is a 3.0V Lithium Manganese Dioxide battery measuring 16.0mm in diameter and 2.0mm in thickness. Like the thinner CR1616, it's a common choice for automotive key fobs and other compact keyless-entry remotes.
Source: IEC 60086-3 · Last reviewed Aug 28, 2026
Specs
| Diameter | 16.00 mm |
| Height | 2.00 mm |
| Nominal Operating Voltage | 3.00 V |
| Chemistry | Lithium Manganese Dioxide |
One Millimeter of Difference
The CR1620 differs from the CR1616 by just 0.4mm of thickness, but that's enough that the two aren't interchangeable in a holder designed for one specific size -- a recurring pattern across the whole CR-series family, where battery compartments grip a cell via spring contacts sized for one exact thickness. Both formats share the same 16mm diameter and 3.0V lithium manganese dioxide chemistry, and both serve largely the same role in automotive key remotes and other compact keyless-entry electronics.