Amazfit’s T-Rex Dual Solar smartwatch charges on both sides

Amazfit has unveiled the T-Rex Dual Solar, a rugged smartwatch that takes solar charging a little further by putting solar panels on both the front and rear of the watch. The setup is designed to extend battery life when the watch is exposed to sunlight, potentially cutting down how often you need to reach for the charger.

The T-Rex Dual Solar has a 660mAh battery rated for up to 21 days of typical use. But Amazfit says that figure can stretch considerably depending on how much sunlight the watch gets.

Worn on the wrist and exposed to three hours of direct sunlight each day, typical battery life can increase to 34 days. Put the larger solar panel on the rear under three hours of direct sunlight daily instead, and that figure rises to 51 days.