The Seiko V182A is a robust solar-powered analog quartz movement with chronograph functionality, designed for modern sports and performance-oriented wristwatches. It is a part of Seiko’s solar chronograph lineup, combining the brand’s commitment to sustainable energy solutions with the precision and convenience of quartz technology. The V182A powers many of Seiko’s Prospex, Diver, and Sportura series models.

Overview

The Seiko V182A integrates solar charging, a three-register chronograph, and a date display, all in a relatively compact and efficient form factor. It utilizes a solar panel beneath the dial to convert light into energy, stored in a secondary rechargeable battery (capacitor). Once fully charged, the watch can run for up to 6 months without further light exposure.

This caliber is well-suited for watches meant for active lifestyles, offering functionality like 60-minute stopwatch timing, 24-hour indication, and date tracking—all with the advantage of low maintenance.

Key Features

• Three-Hand Display: Hour, minute, and central chronograph seconds.

• Chronograph Function:

  • 60-minute counter (at 9 o’clock subdial)

  • 24-hour indicator (at 3 o’clock subdial)

  • Central stopwatch seconds hand

• Date Display: Window typically positioned at 4 or 6 o’clock.

• Solar Charging: Powered by light, no battery replacement needed.

• Overcharge Prevention Circuit: Protects the rechargeable cell from damage.

• Power Reserve: Up to 6 months on a full charge.

• Quickstart: After a few minutes of light exposure, the watch resumes operation.

• Hacking Seconds: The second hand stops when the crown is pulled out for time setting.

Technical Specifications

• Caliber: Seiko V182A

• Movement Type: Solar Quartz (Analog Chronograph)

• Battery Type: Rechargeable cell (capacitor, factory-installed)

• Power Reserve: ~6 months (after full charge)

• Accuracy: ±15 seconds/month

• Chronograph Range: 60 minutes

• Jewel Count: 0

• Dimensions:

  • Diameter: Approx. 28.0 mm

  • Thickness: Approx. 4.5 mm

• Hand Hole Sizes:

  • Hour: 1.20 mm

  • Minute: 0.70 mm

  • Chronograph Seconds: 0.20 mm

This movement fits mid-sized and larger sports watch cases, typically 40–45 mm in diameter.

Charging Guidelines

• Direct Sunlight: ~3 hours for 1 day of operation

• Office Light: ~30 hours for 1 day of operation

• Full Charge (from depleted state):

  • ~20 hours under direct sunlight

  • ~150 hours under fluorescent light

Note: Avoid charging at high temperatures (e.g., in a car) to protect internal components.

Crown and Pusher Operation

Crown Positions:

• Position 0: Normal operation

• Position 1: Quickset date

• Position 2: Time setting with hacking seconds

Pushers:

• Button A (top right): Start/stop chronograph

• Button B (bottom right): Reset chronograph to zero

The 24-hour subdial is synchronized with the main time and is not independently adjustable.

Battery Maintenance and Replacement

• The rechargeable battery is designed to last many years and does not require routine replacement like traditional silver oxide cells.

• Do not substitute with a standard battery, as it may damage the charging system.

• If replacement is required, only use Seiko-authorized rechargeable cells.

Servicing Tips

• Use non-metallic tools during battery service to avoid damaging circuits.

• Clean the solar panel area of any debris or film to ensure efficient light absorption.

• Replace all case gaskets when servicing water-resistant models.

• Perform a pressure test after resealing if applicable.

Common Issues

• Chronograph Hand Misalignment: May occur due to shock. Reset by pulling the crown to position 2 and pressing the pushers to realign the hands.

• 2-Second Tick: Indicates low power reserve. Expose to strong light immediately.

• Watch Stops: Usually due to complete power depletion—requires full recharge.

• Date Doesn’t Advance: Avoid changing date between 9 PM and 3 AM.

• Pushers Not Responding: May be caused by dirt or worn seals—clean and lubricate during service.

Conclusion

The Seiko V182A is a modern, solar-powered chronograph movement offering precision timing, sustainable energy use, and practical features in a user-friendly design. It’s built to handle the rigors of active daily wear and sports environments while maintaining Seiko’s hallmark reliability. With minimal maintenance and efficient solar technology, the V182A provides an ideal blend of utility and performance for contemporary chronograph watches.