Energizer CR2016 Lithium Coin Battery

This is a single Energizer CR2016 lithium coin cell on a child resistant blister card. It gives a nominal 3 volts, and the code doubles as the measurement: under the international naming convention for coin cells, 2016 means a cell 20mm across and 1.6mm thick. That matters more than the badge on the front, because a coin cell only works if the diameter and thickness match the holder exactly. Lithium chemistry holds its voltage steady for most of its working life rather than fading away gradually, so a device tends to run normally and then signal clearly when the cell needs changing.

Cells of this format sit in slim devices where nothing larger will fit: car key fobs, watches, digital scales, small remote controls, calculators and the memory cell on some circuit boards. Before you order, take the old one out and read the code stamped on its face. CR2016, CR2025 and CR2032 all share the same 20mm diameter and are easy to mix up, but they are 1.6mm, 2.5mm and 3.2mm thick in turn, and a thicker cell will not seat properly in a shallower holder. Some key fobs take two of them stacked together, so count what came out.

The pack states a 10 year shelf life, so a spare kept in a drawer will still be good long after you buy it, and the card is child resistant, needing scissors rather than fingers to open. One unit here is one cell. Our minimum order is 10 units, sold in multiples of 10, which suits a household doing every fob and watch in one go, or a workshop keeping a small stock on the shelf. We list other Energizer cells beside it, including CR2032 and CR1620 lithium coin cells, SR626 silver oxide cells and alkaline AA, AAA, C, D and 9V batteries.

What size is a CR2016 cell?

The code is the size. Under the coin cell naming convention, 2016 means 20mm across and 1.6mm thick, and this one runs at a nominal 3 volts.

Will a CR2016 replace a CR2025 or a CR2032?

Not reliably. All three are 20mm wide, but the CR2025 is 2.5mm thick and the CR2032 is 3.2mm, so a thicker cell will not fit a holder built for this one and a thinner one may lose contact.

How many cells do I actually receive?

One cell per unit, on its own blister card. The minimum order is 10 units, sold in multiples of 10, so the smallest order brings you 10 individual cells.

How long will one last in a key fob?

Energizer does not print a runtime figure for this cell, and it would depend on how hard your device works it. What the pack does state is a 10 year shelf life for an unused cell.

Can I keep spares for a few years?

Yes. The pack states a 10 year shelf life, so a spare bought now should still be usable when the one in your watch or fob finally gives up.

Is the packaging hard to open?

It is a child resistant card, so it is meant to resist fingers. Cut it open with a pair of scissors rather than trying to tear the blister free.