Energizer 393 Silver Oxide Button Cell Batteries (10 Pack)

The Energizer 393 is a silver oxide button cell battery delivering 1.55V output in a compact coin form factor. Sold as a 10-pack, these batteries power watches, calculators, medical instruments, thermometers, hearing aids and other small electronics where stable voltage and long runtime matter. Silver oxide chemistry provides flatter discharge curves than alkaline equivalents, maintaining consistent voltage until near depletion.

Each 393 cell measures approximately 9.5mm diameter by 3.6mm height, fitting devices marked for 393, SR754W, SR48, or equivalent designations. The leak-resistant construction protects circuit boards and contacts inside enclosed devices, while the mercury-free silver oxide composition meets current environmental and disposal standards. Shelf life extends to several years when stored at room temperature, making the 10-pack format practical for keeping spares on hand.

Energizer manufactures these cells to ISO 9001 quality standards, with each battery tested for voltage consistency before packaging. The silver oxide composition costs more per cell than alkaline but delivers longer runtime in constant-drain applications like analogue watches and medical instruments, where voltage stability directly affects accuracy. For devices originally fitted with SR754W or 393 cells, this chemistry is the specified replacement.

What devices use 393 batteries?

393 cells power analogue watches, digital thermometers, calculators, hearing aids, glucose meters, and small electronic toys. Any device marked SR754W, SR48, or 393 on the battery compartment uses this size.

How does silver oxide differ from alkaline button cells?

Silver oxide maintains stable voltage throughout its discharge cycle, making it suited to devices requiring consistent power like watches and medical instruments. Alkaline button cells cost less but voltage drops more rapidly as the cell depletes, which can affect device accuracy.

What is the shelf life?

Energizer rates these cells for several years of shelf life when stored at room temperature in the original packaging. The exact duration depends on storage conditions, but unopened cells typically retain usable charge for 3-5 years.

Are these batteries rechargeable?

No. Silver oxide button cells are single-use primary batteries and must not be recharged. Attempting to recharge them can cause leakage, overheating or rupture.