Deep Cycle Marine Battery

LR416, SR416, SR416SW, SR416S, 337 Battery Equivalents, and Replacements

SR416SW or 337 battery is a popular, low-drain wristwatch battery used for powering other small devices, too, that requires a compact, but stable power source.

Other common labels are SR416, LR416, SR416S, and similar. Note: LR416 features alkaline chemistry and is rarely used for quartz watches and other small devices.

Published: February 19, 2021.

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SR416SW/337 Battery Features and Specifications

SR416SW/337 battery is a silver-oxide button/coin-cell battery commonly used in low-drain devices.

Its physical dimensions (DxH) are 4.8 x 1.6 mm (0.1889 x 0.063 inches) and on average it weighs just ~0.12 grams.

The nominal voltage of the silver-oxide SR416SW/337 battery is 1.55 volts, with a cut-off voltage of 1.2 volts and a capacity of ~8 mAh.

For example, the Maxell SR416SW battery features a nominal capacity of 8.3 mAh when being drained with a discharge current of 10 μA.

Because of its tiny dimensions, SR416SW is used for credit card-sized devices and watches without alarms and backlit display - they are that tiny.

The nominal voltage of the alkaline LR416 battery is 1.5 volts, with a cut-off voltage of 0.9-1.0 volts and a capacity of ~5 mAh.

Since silver-oxide chemistry features more stable output voltage, longer shelflife, and larger capacity, silver-oxide SR416SW batteries are much more common, with alkaline LR416 being almost completely phased out.

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SR416SW/337 Battery Safety Issues

SR416SW/337 is a very small battery that can easily get swallowed by kids and/or pets.

Although its capacity is rather low, it can still cause burns due to the electrolytic reactions with body fluids.

So, don't leave SR416SW/337 or any similar battery near pets and kids - fortunately, most of these batteries come in so-called kids/pet safe packaging, preventing them from swallowing them.

However, if that happens, contact the emergency services and act as advised.

Long Story Short: If You are looking for a silver-oxide 4.8x1.6 mm button/coin-cell battery, go for batteries labeled as LR416, SR416, SR416SW, SR416S, and/or 337 from reputable brands.

These batteries are small and thus not expensive, but the batteries from such brands usually feature longer shelflife, larger capacity, longer runtime, etc.

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