It's why we've only ever really seen solar tech added to watches and pocket calculators. But a lot has changed since the first solar calculator was launched in the 1970s (anyone still have a Sharp ...

Calculator aesthetics are apparently very important to some people, so Casio Japan has announced a new Comfy JT-200T solar-powered model that relocates its solar cell to the top edge keeping it ...

The Citizen Caliber 0100 Eco-Drive is a solar-powered concept pocket watch that is accurate to within ± one second per year thanks to a new movement that incorporates self-correcting technology ...

Indoor solar power technology is finally becoming available; some devices no longer need batteries at all.

This article is part of a series of sustainability-themed articles we're running to observe Earth Day 2025 and promote more sustainable practices. Check out all of our Sustainability Week 2025 ...

Solar-powered gadgets are slowly becoming more widely accessible ... It's why we've only ever really seen solar tech added to watches and pocket calculators.