Maxell SR44W Battery

Maxell SR44W Overview

The Maxell SR44W is a high‑drain, 1.55 V silver‑oxide coin cell designed to power devices that draw short, frequent bursts of current while requiring a steady voltage. Typical uses include chronograph watches with alarms or backlights, camera light meters, laser sights/pointers (where compatible), and portable measuring tools.

Key Specifications

Chemistry	Silver oxide (high drain)
Nominal voltage	1.55 V
Capacity	~165 mAh (typical)
Size (IEC)	SR1154 (11.6 mm diameter × 5.4 mm height)
Weight	~2.3 g
Operating temperature	−10 °C to +60 °C

Compatibility and Cross‑References

• Also known as: 357, SR44W, SR44, SR1154W.
• Same physical size as LR44 (A76/AG13) but with better voltage stability and generally longer life.
• Not the same as SR44SW (303). SR44SW is optimized for low‑drain loads.
• Not interchangeable with lithium CR1/3N (3 V).

When to Choose SR44W

• Use if your device has motors, alarms, backlighting, or other features that cause brief current spikes (e.g., chronographs, certain cameras/meters).
• Avoid if your device is a simple analog watch with steady, low current draw—choose SR44SW (303) instead for optimal longevity.
• Check your device or manual for “W” (high‑drain) vs “SW” (low‑drain) requirements.

Performance Expectations

• Multifunction or chronograph watch: often 1–2 years depending on feature use and backlight/alarms.
• Light meters, laser pointers, small test instruments: months to 1+ year based on duty cycle and storage.
• Voltage remains relatively stable over most of the discharge, helping maintain accuracy in meters and timing devices.

SR44W vs. SR44SW (303)

	SR44W (357)	SR44SW (303)
Drain type	High drain	Low drain
Best for	Chronographs, alarms, backlights, meters	Simple analog watches
Voltage stability under load	Better during current spikes	Optimized for steady, low current
Physical size/voltage	Same (11.6 × 5.4 mm, 1.55 V)	Same (11.6 × 5.4 mm, 1.55 V)

Alternatives and Substitutions

• LR44 (A76/AG13, alkaline): lower cost but shorter life and more voltage drop under load; acceptable for low‑importance, non‑precision devices.
• SR44SW (303): better for low‑drain analog watches; may provide longer service in those devices.
• CR1/3N (lithium, 3 V): not a substitute; different voltage and chemistry.

Replacement Steps

1. Power off the device. Open the battery compartment with the proper tool.
2. Note polarity of the old cell; avoid touching contacts with metal tools.
3. Insert the new SR44W with matching polarity and ensure a snug, clean contact.
4. Close the compartment. For watches, ensure the gasket is seated to maintain water resistance.
5. Test the device. Recalibrate meters if required.

Storage and Safety

• Store in original packaging in a cool, dry place; avoid heat and direct sun.
• Keep out of reach of children. Button batteries pose an ingestion hazard—seek immediate medical help if swallowed.
• Do not recharge, short, or incinerate. Do not mix old and new cells or different chemistries.
• Recycle through approved battery collection points; tape terminals before disposal to prevent shorting.

FAQ

Is SR44W the same as 357?

Yes. 357 is a common code for the high‑drain SR44W silver‑oxide cell.

Can I use LR44 instead of SR44W?

It will fit, but LR44 (alkaline) generally provides shorter life and less stable voltage—often unsuitable for cameras, meters, or chronograph features.

Can SR44W replace SR44SW (303)?

They are physically interchangeable, but devices designed for low‑drain operation (simple analog watches) typically perform best with SR44SW. Follow the device’s specification.

What is the shelf life?

Silver‑oxide cells typically offer a multi‑year shelf life when stored properly. Check the date code and use older stock first.

How do I dispose of used cells?

Recycle via local battery recycling programs. Do not dispose of in household trash.