Caliber V176 The Seiko caliber V176 is a Solar Chronograph with date display. Seiko Solar uses an ultra-efficient Solar cell that is able to create energy from all types of light, not just sunlight. This energy is stored in a very small rechargeable battery that lasts many times longer than conventional batteries. The timepiece is protected against overcharging. This makes the watch virtually maintenance-free. When fully charged, caliber V176 has an energy reserve of 6 months. If there is a threat of energy shortage, the watch gives a warning by running the second hand in steps of 2 seconds instead of every 1 second. The stopwatch measures up to 60 minutes in 1/20 second steps. Split time measurements are possible. Seiko Solar is one of the most appealing points within Seiko's Clean Energy Concept.