... battery-powered pocket devices such as smarthones and digital cameras.
"What is very important is that our system is flat, so it is not necessary to carry a bag [for the charging device] and it’s not necessary to place this system in a pocket, for example," Blums told Deutsche Welle.
The system can be implanted in a normal-looking men’s jacket by placing flat induction coils in each side of the garment. Measuring just 1.5 centimeters in diameter each, the coils aren't noticeable.
The mini-generator also features a tiny standard microelectronic transformer placed beside the coils which turns the energy from the jacket's wearer into electricity.
Explains Blums: "Coils are placed in the sides of the jacket, and at the end of the sleeve we have a magnet. The natural motions of our hand which we are moving while going forward - this energy of the motion is transformed into electrical energy."
The average person's walking speed is around five kilometres (three miles) per hour. That means that a pedestrian can generate 200 to 300 microwatts during an hour.
Predictably the system, still in its development stage, is as yet far from market-ready. Powering an iPhone, for example, would take several hours, and it's sufficient to power wireless sensors for up to six hours.
The concept of harnessing the body’s energy to produce electricity has roused interest among Latvia's military, who would like to adopt energy harvesters for what they call a Combat Individual Protection System.
That's a kit that includes all of the standard gear - camouflage systems, helmets, sleeping bags, boots, night vision goggles and more. The energy technology would allow the soldiers to recharge their devices while they are in the field without having to carry extra batteries.
And marketeers will not be slow to recognise the system's potential for consumer markets, for example the leisure and camping industries.