379 / SR521SW Batteries
Price range: 7.99 € through 12.99 € VAT Inc.
Power an older UltraMini receiver that specifically lists 379 / SR521SW with a pack of four or ten cells. Current UltraMini receivers using 337 / SR416SW need that different cell format. Read the battery code on the exact receiver before choosing.
379 / SR521SW button cells are for older UltraMini receivers that specifically require this battery code. Select a pack of 4 or 10 and match the existing receiver instructions before ordering.
Keep older and current UltraMini battery formats separate
These cells are intended for the older UltraMini version with an extraction bar, when it specifies 379 / SR521SW. Current UltraMini models specifying 337 / SR416SW require that different cell instead.
Check the code on the existing cell or the exact receiver manual. The UltraMini name on its own is not enough to choose between these formats.
Select the replacement pack
Choose 4 or 10 in the Quantity selector. This listing supplies the selected number of 379 / SR521SW cells for a compatible older receiver.
Ask support if you cannot identify the receiver revision. The product image is an illustrative render of the battery format, rather than a supplier photograph.
| Item | Details |
|---|---|
| Battery code | 379 / SR521SW |
| Receiver revision | Older UltraMini specifying 379 / SR521SW |
| Pack choice | 4 or 10 cells |
| Weight | 0.001 kg |
|---|---|
| Dimensions | 5 × 2.5 × 0.9 cm |
| Quantity | 10, 4 |
| Product type | Replacement button-cell batteries |
| Battery model | 379 / SR521SW |
| Compatible models | Older UltraMini earpieces specifying 379 / SR521SW |
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