The CR2430 is a 3-volt lithium coin cell, 24mm across and 3mm thick. It is used in some electronic cat flaps, collar lights and trackers, kitchen and pet scales and other small devices. It is not interchangeable with the thinner CR2032 or the smaller CR2025 — match the code on the old cell.
One battery. See also the Energizer A23. Part of the Energizer range.
Key points
- 3V lithium — CR2430 size.
- Single battery.
Safety
Coin cells are extremely dangerous if swallowed by children or pets. Store out of reach and seek emergency help straight away if one is swallowed.

