While smartphones, smarthomes and even smart wearables are growing ever more advanced, they're still limited by power. The battery hasn't advanced in decades. But we're on the verge of a power revolution. Skin power Using the power of friction a device has been created that can harness electricity from a person's skin. The result is enough power, from a finger tap on skin, to power 12 LED bulbs. The future could mean there are no need for batteries in wearables or smart clothes. So how does it work? An electrode is used to harvest the current, so a 50nm-thick gold film is used. The gold film sits below a silicone rubber layer composed of thousands of tiny pillars that help create more surface area for skin contact, which creates more friction. Since the skin is a one of the triboelectric layers it means the device can be small. Scientists have already shown off a wearable powered by the device. Next gadgets to use it? Hopefully everything. Foldable battery is paper-like but tough Imagine a battery built into the strap of a smartwatch, finally battery life on wearables won't be such an issue while allowing the size of the devices to be shrunk down. Another possible development from this advancement would be foldable tablets that you could fit into your pocket just like a phone. Then when you want a big screen view simply unfold the tablet and you're all set for viewing. The battery has already been created and has even been safety tested, including being folded over 200,000 times without losing performance. uBeam over the air charging uBeam uses ultrasound to transmit electricity. Power is turned into these sound waves to be transmitted and then converted back to power on reaching the device. The uBeam concept was stumbled upon by 25-year-old astrobiology graduate Meredith Perry. She started the company that will make it possible to charge gadgets over the air using a 5mm thick plate. These transmitters can be attached to walls, or made into decorative art, to beam power to smartphones and laptops for example. The gadgets just need a thin receiver to be added in order to receive the charge. Expect to see uBeam as a viable upgrade to your gadgets this year or early next. Organic battery, 97 per cent cheaper to make One possible future of power could be in organic batteries if a recent MIT discovery makes it to production. Scientists have created an organic flow battery that costs only $27 per kilowatt-hour compared to metal batteries at $700 per killowatt-hour - nearly a 97 per cent saving. Using quinone molecules, that are almost identical to those found in rhubarb, a battery was made that is not only as efficient as metal but that could also be made on a huge scale. Google, Apple and Tesla It's not just scientists and start-ups working on improving battery life in your gadgets. Google recently hired a former Apple battery expert to work on improving current batteries as well as creating new ones. Tesla is constantly innovating in the battery space to help improve the efficiency and performance of its electric sports cars. Apple is rumoured to be working on batteries, potentially, for a future Apple Car.