Solar & Kinetic — Eco-Powered Timekeeping

What if your watch never needed a battery change? Solar and kinetic movements convert energy from light or motion into electrical power.

☀️ SOLAR POWERED

Tiny solar cells beneath the dial convert any light into electricity. A full charge can last 6-12 months in complete darkness.

• Citizen Eco-Drive: Pioneered solar since 1976
• Casio Tough Solar: Powers their G-Shock and Pro Trek lines
• Seiko Solar: Combined with GPS for atomic accuracy

🔄 KINETIC (SEIKO)

Like an automatic movement, a rotor spins with wrist motion — but instead of winding a mainspring, it generates electricity stored in a capacitor.

• 6-month power reserve when fully charged
• "Auto Relay" feature: If unworn, hands stop to save energy, but the IC keeps counting. When picked up, hands spin forward to the correct time!

📝 PRO TIP

Solar watches charge even in indoor lighting, but give them a "sunbath" near a window once a month for optimal charge.