Universal remote controls are dime a dozen these days, and if you like one that is affordable, you might want to check out Logitech’s Harmony 300 – although the Powerplus Leopard solar-powered universal TV remote control is greener in terms of operational value compared to Logitech’s offering. It can charge from direct sunlight or under ambient light from artificial sources, which basically means it will keep on going and going perpetually until you have run through a few TVs and have grandkids by then. Features include 34 different function buttons and an internal lithium-ion battery which prefers to bask under direct sunlight like any other solar-powered device. It has dimensions which are pretty similar to a standard battery-powered remote at 18.6cm x 4.9cm x 1.7cm, and retails for a mere £9.99 inclusive of delivery.