Energizer Silver Oxide Coin Cell Batteries (394/380)

This is a single silver oxide coin cell from Energizer, marked 394/380 on its face. The two numbers are alternative references for the same cell, so a device calling for either one takes this battery. Silver oxide is the chemistry chosen for small precision electronics because it holds a steady voltage for most of its working life rather than tailing off gradually, which keeps a quartz watch movement running to time until the cell is genuinely spent. It is priced and sold per cell, so what you add to the basket is one battery rather than a card or a box.

Coin cells of this format are the usual fit for wristwatches, small carriage and travel clocks, key fobs, digital calipers, laser pointers and the kind of compact electronics that run for years on one battery. The safest way to buy is by the number: open the back of the watch or the battery door, read the code stamped on the old cell, and match it to the 394 or 380 marking here. A cell that is a fraction too tall or too wide will not make proper contact, so the code matters far more than the look of it.

Because these are sold individually, the pack quantity row reads single cell and the minimum order is ten, bought in multiples of ten. That suits a watchmaker, a repair bench, or anyone who would rather keep spares in a drawer than order one at a time. The manufacturer does not print a shelf life figure on this cell. We stock other Energizer coin cells beside this one, including lithium CR1216, CR1220, CR1225 and CR2032 types and an alkaline LR54/189, if the device you are fitting turns out to want a different reference.

Is 394 the same cell as 380?

Yes. Both numbers refer to this one cell and both are marked on its face, so a watch or device that lists either reference takes it.

How many cells do I actually receive?

One cell per unit, because this listing is priced and sold per cell. The minimum order is ten units, bought in multiples of ten.

How do I check it is the right cell for my watch?

Read the code printed on the cell you are taking out and match it to 394 or 380. Coin cells vary by fractions of a millimetre, so the code is the only reliable guide.

Can I fit a lithium coin cell such as a CR2032 instead?

No. Lithium coin cells run at a higher nominal voltage than silver oxide types and are a different size, so fit only the reference the device or the old cell gives.

What does silver oxide give me that an alkaline coin cell does not?

Silver oxide chemistry holds a flatter voltage across its life, which is why watch movements and small measuring instruments are usually specified for it.