Energizer Specialty 384/392 Batteries

This is the Energizer 384/392, a 1.55V silver oxide coin cell that is priced and sold as a single cell rather than on a card or a strip. It carries two numbers because 384 and 392 describe the same physical cell under two numbering conventions, so a device that asks for either code takes this one. Chemistry matters here more than the name: at 1.55V this is a silver oxide cell, and the voltage marked on the cell face is the quickest way to confirm you have the right thing in your hand. The minimum order is ten cells, in multiples of ten.

Cells of this size and voltage are watch cells first, and the same code turns up in small clocks, calculators, key fobs, laser pointers and digital thermometers. The surest way to buy is to read the number printed on the cell already in the device, or the figure given in its instructions, and match it: either 384 or 392 points here. If the old cell shows some other number, check that it cross-references to this one before you fit it, because coin cells of a similar diameter can differ in height by a fraction of a millimetre and a case back will not close properly on the wrong one.

Silver oxide holds a steady voltage through most of its working life and then falls away quickly at the end, which is why watch movements and small digital displays favour it: the hands keep proper time instead of slowing gradually as the cell tires. Handle a new cell by its edge rather than across both faces, and keep it in its packaging until you fit it. The pack does not print a shelf life figure. This cell sits alongside our other Energizer coin cells, including the CR2032, CR1220 and LR44.

Are 384 and 392 the same battery?

Yes. They are two numbering conventions for one physical cell, so a watch or device calling for either number takes this one.

How many cells do I actually receive?

This listing is priced and sold per cell, and the minimum order is ten, in multiples of ten, so the smallest order brings ten individual cells.

Is this a lithium cell?

No. It is a silver oxide cell at 1.55V. Lithium coin cells run at 3V, so voltage alone tells the two chemistries apart.

How do I check it will fit my watch?

Read the code off the cell currently fitted, or the number quoted in the watch instructions, and look for 384 or 392 before ordering.

Why do small digital devices prefer silver oxide?

The voltage stays flat for most of the cell's working life, so timekeeping and displays stay accurate rather than drifting as the cell weakens.