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Energizer 397/396 Silver Oxide Button Cell Batteries (10 Pack)

£199
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Energizer 397/396 is a silver oxide button cell battery delivering 1.55V output in a compact coin form factor. Each battery uses silver oxide chemistry rather than alkaline, providing more stable voltage discharge across its operating life and making it suitable for precision devices that require consistent power rather than fluctuating output as the cell depletes.

These batteries are commonly fitted to analogue and digital watches, small calculators, medical instruments such as glucose monitors and thermometers, hearing aids, and keyless entry fobs. The 397/396 designation indicates cross-compatibility between two IEC reference numbers (SR726SW and SR726W) that share identical physical dimensions and voltage but differ slightly in drain rate optimisation. This pack contains 10 individual cells.

Silver oxide cells hold their charge during storage better than alkaline equivalents, with shelf life extending several years when kept in cool, dry conditions. The cell diameter is 7.9mm with a height of 2.6mm, and each weighs approximately 1g. The leak-resistant seal protects the silver oxide chemistry from moisture ingress and reduces the risk of corrosive discharge damaging device internals during storage or use.

Specification
Weight (KG) 0.01
Battery Range Energizer Specialist
Cell Size 397
Cell Composition Silver Oxide
Frequently Asked

What devices use 397/396 batteries?

Common applications include analogue and digital watches, small calculators, glucose monitors, digital thermometers, hearing aids, laser pointers, and car key fobs. Check your device manual or the existing battery for confirmation before ordering.

What is the difference between 397 and 396?

Both share identical physical size and 1.55V output. The 397 (SR726SW) is optimised for low-drain devices like watches, while the 396 (SR726W) suits higher-drain applications. In practice they are functionally interchangeable for most consumer devices.

How long do these batteries last in storage?

Silver oxide cells maintain charge better than alkaline button cells. Shelf life is typically 3-5 years when stored in cool, dry conditions away from direct heat or moisture. The date code on the cell indicates manufacture date.

Can these replace LR726 alkaline batteries?

Yes, in most cases. The LR726 alkaline equivalent has the same physical dimensions but delivers 1.5V with less stable discharge. Silver oxide 397/396 cells provide better performance and longer runtime in precision devices, though they cost slightly more per cell.

Shipping & Returns

Free worldwide delivery

Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

Returns

30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.

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    Description

    The Energizer 397/396 is a silver oxide button cell battery delivering 1.55V output in a compact coin form factor. Each battery uses silver oxide chemistry rather than alkaline, providing more stable voltage discharge across its operating life and making it suitable for precision devices that require consistent power rather than fluctuating output as the cell depletes.

    These batteries are commonly fitted to analogue and digital watches, small calculators, medical instruments such as glucose monitors and thermometers, hearing aids, and keyless entry fobs. The 397/396 designation indicates cross-compatibility between two IEC reference numbers (SR726SW and SR726W) that share identical physical dimensions and voltage but differ slightly in drain rate optimisation. This pack contains 10 individual cells.

    Silver oxide cells hold their charge during storage better than alkaline equivalents, with shelf life extending several years when kept in cool, dry conditions. The cell diameter is 7.9mm with a height of 2.6mm, and each weighs approximately 1g. The leak-resistant seal protects the silver oxide chemistry from moisture ingress and reduces the risk of corrosive discharge damaging device internals during storage or use.

    Specification
    Weight (KG) 0.01
    Battery Range Energizer Specialist
    Cell Size 397
    Cell Composition Silver Oxide
    Frequently Asked

    What devices use 397/396 batteries?

    Common applications include analogue and digital watches, small calculators, glucose monitors, digital thermometers, hearing aids, laser pointers, and car key fobs. Check your device manual or the existing battery for confirmation before ordering.

    What is the difference between 397 and 396?

    Both share identical physical size and 1.55V output. The 397 (SR726SW) is optimised for low-drain devices like watches, while the 396 (SR726W) suits higher-drain applications. In practice they are functionally interchangeable for most consumer devices.

    How long do these batteries last in storage?

    Silver oxide cells maintain charge better than alkaline button cells. Shelf life is typically 3-5 years when stored in cool, dry conditions away from direct heat or moisture. The date code on the cell indicates manufacture date.

    Can these replace LR726 alkaline batteries?

    Yes, in most cases. The LR726 alkaline equivalent has the same physical dimensions but delivers 1.5V with less stable discharge. Silver oxide 397/396 cells provide better performance and longer runtime in precision devices, though they cost slightly more per cell.

    Shipping & Returns

    Free worldwide delivery

    Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

    Returns

    30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.