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Ten silver oxide button cells in blister pack, 6.8 mm diameter, 2.1 mm thick

Renata

Renata 364 / SR621SW Silver Oxide Button Battery 10-Pack

SKU CH-6HYX-3J565

Pack of ten 364/SR621SW silver oxide button cells delivering 1.55 V in a 6.8 mm × 2.1 mm size

  • Battery type364
  • Reliable 1.55 V output powers precision devices
  • Silver oxide chemistry delivers stable voltage over time
  • Compact 6.8 mm x 2.1 mm size fits slim compartments
  • Ten batteries per pack ensures spares are ready
  • Cross-referenced to 364, SR621SW and 280-34 equivalents

Compatible Devices

These 1.55 V silver oxide cells measure 6.8 mm by 2.1 mm and fit watches, calculators, medical instruments and small remotes that specify the 364 or SR621SW size. The chemistry delivers stable voltage for precise timekeeping and low-drain electronics.

Who Should Choose Another Cell

Buyers who need a higher capacity for power-hungry gadgets or a rechargeable format cannot use these primary button cells. The 10-piece quantity also suits single replacements poorly if only one battery is required.

Decisive Specification

The critical detail is the 364 / SR621SW designation combined with 1.55 V silver oxide chemistry; matching both ensures the device receives the correct voltage and physical fit.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $16.99
Pricier than about 72% of the 10,440 comparable items (median $10.99).

Specifications

Power
Battery type364

Questions about this item

How do I install the 364 / SR621SW battery in my device, and what step is often missed?

Insert the 6.8 mm x 2.1 mm cell with the positive side facing the contact marked +; the step people miss is removing the thin plastic insulator tab before closing the compartment.

What maintenance or replacement will the 10-pack of silver oxide cells need later?

Each 1.55 V cell is primary chemistry, so no recharging is possible; when voltage drops the entire cell is replaced — keep unused units in the original blister at room temperature until needed.

What limit appears first when a 364 / SR621SW battery runs under continuous load?

The 1.55 V output falls steadily as the silver oxide chemistry depletes; once the device’s minimum operating voltage is reached the cell must be swapped.

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