Energizer CR1216 Lithium Coin Battery

This is a single Energizer CR1216 lithium coin cell, the flat 3V button battery that a good deal of compact electronics is built around. Lithium chemistry is what makes a cell this small worth using: it gives a nominal 3V from one cell, twice the 1.5V of an alkaline button cell, and holds that voltage steadily rather than tailing off early. The code is the part to match. CR1216 names one particular diameter and thickness, and a cell that is close but not identical will either rattle in the holder or refuse to seat, so read the code off the old cell or the inside of the battery door before you order.

CR1216 cells turn up in slim, low drain equipment: key fobs, small remote controls, watches, digital thermometers, calculators, fitness and medical monitors, and the memory backup position on some electronic boards. They suit jobs where there is barely any room for a battery and the device draws a trickle of current over months rather than a heavy pull over hours. If you keep a drawer of spares for household gadgets, it is worth noting each code down as you go, because the difference between one CR number and the next is often a fraction of a millimetre.

Each unit is one cell on a card the pack marks as child resistant, which is the sensible way to store batteries this size: keep them carded and well out of reach of children and pets until the moment they go in. We sell this listing as a single cell, with a minimum order of ten units in multiples of ten, so it works for a workshop, a repair bench or a busy household. Energizer coin cells here also run to CR2032, CR1620, LR44 and SR626 if the device on your bench takes another size.

How do I know my device takes a CR1216?

Slide the old cell out and read the code stamped on its face, or check the printing inside the battery door. Fit only a cell marked CR1216.

How many cells do I actually receive?

One. Each unit of this listing is a single CR1216 cell on its own card, and the minimum order is ten units, sold in multiples of ten.

What voltage does a CR1216 give?

A nominal 3V, which is standard for a lithium coin cell and double the 1.5V you would get from an alkaline button cell.

Will a CR1220 or CR1225 fit instead?

Not reliably. Those codes describe cells of a different thickness, so they may not seat or make proper contact. Match the code your device prints.

How long can I keep spares before fitting them?

Keep cells carded in a dry drawer at room temperature, away from loose coins and keys.