Maxell SR916SW Battery

Maxell SR916SW Battery (373) — Low-Drain Silver Oxide for Slim Watches

The Maxell SR916SW is a primary (non-rechargeable) silver oxide coin cell built for continuous, low-drain loads. Its compact 9.5 x 1.65 mm size and stable 1.55 V output suit analog watches and other precision devices that need steady voltage rather than power bursts.

Key Specs

• Chemistry: Silver Oxide (low-drain)
• Nominal Voltage: 1.55 V
• Typical Capacity: 35–45 mAh (varies by device load and temperature)
• Size: 9.5 mm diameter x 1.65 mm height (size code 916)
• Approx. Weight: ~0.6 g
• Operating Range: -10°C to +60°C
• Shelf Life: up to 3–5 years in original packaging at room temperature
• Cross-Reference: 373, SR916, SR916SW

When to Choose SR916SW

• Use if your device is an analog watch, slim calculator, or small measuring instrument that specifies SR916SW/373.
• Use if the manual calls for a low-drain silver oxide cell.
• Avoid if your device lists SR916W (high-drain) or requires frequent power bursts (e.g., multifunction watches with alarms/lights); choose SR916W instead.

Performance Notes

• Flat discharge curve helps maintain accurate timekeeping until near end-of-life.
• In a simple analog watch, expected service life is often about 2–4 years, depending on the movement, features, and temperature.
• Leak-resistant construction helps protect delicate watch movements when used and stored correctly.

Compatibility and Equivalents

SR916SW is dimensionally identical to SR916W but optimized for low-drain. Many cross-reference lists label SR916SW as 373. Always match the drain type specified by your device.

Type	Voltage	Drain	Typical Uses
SR916SW (373)	1.55 V	Low-drain	Analog watches, precision instruments
SR916W	1.55 V	High-drain	Multifunction watches, features with alarms/lights

Note: Alkaline cells of the same size (e.g., LR916) have lower capacity and a sloped discharge curve; they are not recommended as direct replacements for timekeeping accuracy.

Installation Steps

1. Open the case or battery hatch using the correct tool; protect gaskets and avoid scratching the movement.
2. Note polarity before removal (usually the “+” side faces up).
3. Insert the new SR916SW without bending contacts; use non-metallic tweezers to avoid shorting.
4. Close the case securely and verify operation. For water-resistant watches, check or replace the case gasket as needed.

Storage and Safety

• Store in original packaging, cool and dry, away from metal objects.
• Do not recharge, disassemble, or expose to heat.
• Keep out of reach of children—coin cells are an ingestion hazard. If swallowed, seek immediate medical attention.
• Recycle through approved battery collection points; do not dispose of in household trash.
• Most modern SR916SW cells are mercury-free; confirm on packaging.

FAQs

Is SR916SW the same as 373?

Yes. 373 is a common cross-reference for SR916SW with the same size and low-drain silver oxide chemistry.

Can I use SR916SW instead of SR916W?

Only if your device allows it. Analog watches typically use SW (low-drain). Devices that require W (high-drain) may experience reduced performance with SW cells.

How long will it last in a watch?

About 2–4 years in a simple analog watch, depending on movement efficiency, features, and temperature.

Are alkaline equivalents acceptable?

Not recommended. Alkaline cells of the same size have lower capacity and a sloped discharge curve that can impact accuracy and runtime.

What if my device lists multiple numbers?

Match size (9.5 x 1.65 mm) and chemistry (silver oxide) and ensure low-drain (SW) if specified. Cross-references like 373 usually indicate the same cell.