There are plenty of battery-powered chargers on the market to top up on your smartphone during a long day's use. But a company called Intelligent Energy hopes to go a step beyond that with a $200 hydrogen fuel cell device called Upp.
The device has a detachable cartridge that has 25 amp-hours (25,000mAh) of charge -- more than 10 times the 1,800mAh to 2,300mAh common in today's smartphones. In practice, a single cartridge is good enough for five charges, the company said.
The company is aiming for emerging markets first -- it announced the Upp … Read more