Seiko has announced the Astron GPS Solar, a watch that uses GPS to automatically change its time based on ... The automatic GPS limit is probably down to battery life — the watch is solar ...

They were also the world’s first solar GPS watches, which means they draw their energy from light and rarely require a battery change. The timekeeping prowess of Seiko’s Astron watches is ...

Some are generic. Others show how to replace a battery for a specific brand such as Nike, Fossil, Casio, Swiss Army, Citizen and Seiko. If you've never tried it before, watch the video first.

They were also the world’s first solar GPS watches, which means they draw their energy from light and rarely require a battery change. The timekeeping prowess of Seiko’s Astron watches is impressive, ...