Energizer CR2032 Lithium Coin Battery

This is one Energizer CR2032 lithium coin cell, the 3V button battery that hides behind a small door in more household devices than most people expect. The pack states 3 volts and the cell itself is marked CR2032. That code is an IEC designation rather than a product name: CR means lithium manganese dioxide chemistry, 20 is the diameter in millimetres and 32 is the thickness in tenths of a millimetre. So if a manual asks for a 2032, this is the cell it wants. It arrives on its own child resistant card, as the pack notes.

The CR2032 is the most widely used coin cell in the house. It sits in car key fobs and alarm remotes, in kitchen and body scales, in digital thermometers and blood glucose meters, in fitness trackers and heart rate straps, in small LED tea lights, and on computer motherboards, where it holds the clock and the firmware settings while the machine is off. If a fob has gone intermittent at ten paces rather than failing outright, the cell is usually the reason. Prise the case open along its seam, note which way up the old cell sits, and match it.

Lithium coin cells hold their charge in storage far better than alkaline chemistry does, which is why a spare in the drawer is worth having. Handle the cell by its edges, since finger grease on the flat faces can interfere with contact, and keep it out of reach of small children until it is fitted. You receive one cell per unit, and the listing carries a minimum order of 10, sold in multiples of 10. We also stock Energizer coin cells in a 12 pack of the same CR2032, along with AA, AAA, C, D and 9V sizes.

How many cells do I actually receive?

One. Each unit of this listing is a single CR2032 cell on its own card, and the minimum order is 10 units, sold in multiples of 10.

What does the CR2032 code mean?

It is a standard IEC designation. CR indicates lithium manganese dioxide chemistry, 20 is the diameter in millimetres and 32 is the thickness in tenths of a millimetre.

What voltage does it give?

Three volts, printed on the pack and on the cell face. A coin cell of this type is a single cell, so one of them supplies the full 3V.

Which devices normally take a CR2032?

Car key fobs, alarm and garage remotes, kitchen and body scales, digital thermometers, glucose meters, fitness trackers, small LED tea lights and computer motherboards all commonly use one.

Which way up does the cell fit?

The printed face is the positive terminal. Note how the old cell sits before you lift it out, then fit the replacement the same way up.