The PowerWatch 2 is now available to buy: Heart rate, GPS and eternal battery life
Series 2 – PowerWatch
Minix ZERO smartwatch launched in India with power-packed features | PINKVILLA
Matrix's PowerWatch 2 needs no charger, uses body heat and solar power - The Verge
Matrix PowerWatch Series 2 Review: - Wearables - Smartwatches - PC World Australia
China Health Smart Watch HD Call Music DIY Wallpaper Intelligent Power Saving 24 Hour Heart Rate Monitoring Q88 Smartwatch - China Smart Watch and Smart Bracelet price
Body Heat Powers This Smart Watch | MIT Technology Review
Matrix is raising $17.3 million for smartwatch powered by body heat