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.Big technology companies, and now car companies that are making electric vehicles, are all too aware of the limitations of lithium-ion batteries. While chips and operating systems are becoming more efficient to save power we're still only looking at a day or two of use on a smartphone before having to recharge. That's why universities are getting involved.We've seen a plethora of battery discoveries coming out of universities all over the world. Tech companies and car manufacturers are pumping money into battery development, and with races like Formula E adding pressure to improve, that technology is only going to get greater.But while we've been writing about these developments for years they still haven't made it to our phones. This is because everyone is waiting for the perfect replacement before making the jump. That, and commitments to current batteries thanks to manufacturing techniques that cost a lot to change and existing deals for minerals being hard to break.Things are starting to change though, so\u00a0we've collected all the best battery discoveries that could be with us soon. From over the air charging to super-fast 30-second re-charging, you could be seeing this tech in your gadgets sooner than you think.Lithium-air breathing batteriesLithium-air means using oxygen as the oxidiser, rather than a material. The result is batteries that can be a fifth of the price and a fifth as light as lithium-ion, plus they could make phones and cars last five times longer.The new discovering was made at Dallas University and should help push developments in lithium-air forward. Of course, like a all research, this could still be five to ten years away from becoming a reality.\u00a0Bioo plant chargerThe Bioo is a plant pot that harnesses the power of photosynthesis to charge your device, be it a tablet or phone. This already exists and can be bought now.Bioo offers two to three charges per day at 3.5V and 0.5A via a USB port that's cleverly disguised as a rock. The pot uses organic materials that react with the water and organic matter from the plant's photosynthesising. This creates a reaction that generates enough power to charge gadgets.This is just the start, imagine entire forests harnessed in this way. Not only could cities be powered with 100 per cent green energy but there could be yet another reason to\u00a0protect plants\u00a0and trees.Gold nanowire batteriesGreat minds over at the University of California Irvine have cracked nanowire batteries that can withstand plenty of recharging. The result could be future batteries that don't die.Nanowires, a thousand times thinner than a human hair, pose a great possibility for future batteries. But they've always broken down when recharging. This discovery uses gold nanowires in a gel electrolyte to avoid that. In fact these batteries were tested recharging over 200,000 times in three months and showed no degradation at all.This could be ideal for future electric cars, spacecraft and phones that will never need new batteries.Magnesium batteriesScientists have discovered a way to harness magnesium for batteries. This means smaller, more densely packed units that won't need shielding. In the long run that should mean cheaper batteries, smaller devices and less reliance on lithium-ion. Just don't expect to see these appear soon as they're still in the developmental stages.Solid state lithium-ionSolid state batteries traditionally offer stability but at the cost of electrolyte transmissions. A paper published by Toyota scientists writes about their tests of a solid state battery which uses sulfide superionic conductors. All this means a superior battery.The result is a battery that can operate at super capacitor levels to completely charge or discharge in just seven minutes - making it ideal for cars. Since it's solid state that also means it's far more stable and safer than current batteries. The solid-state unit should also be able to work in as low as minus 30 degrees Celsius and up to one hundred.\u00a0The electrolyte materials still pose challenges so don't expect to see these in cars soon, but it's a step in the right direction towards safer, faster charging batteries.Fuel cell for phones and dronesA new fuel cell has been developed that could mean phones only need to charge once a week and drones stay airbourne for over an hour.Scientists at\u00a0Pohang University of Science and Technology in South Korea have, for the first time,\u00a0combined porous stainless steel with thin-film electrolyte and electrodes of minimal heat capacity. The result is a battery that's more durable and longer lasting than lithium-ion.Development for phones, drones and even electric cars is expected\u00a0to follow the announcement. Since it's South Korea we may even see it in the next Samsung Galaxy S8 smartphone.Graphene car batteriesGraphene batteries are the future. One company has developed a new battery, called Grabat, that could offer electric cars a driving range of up to 500 miles on a charge.\u00a0Graphenano, the company behind the development,\u00a0says the batteries can be charged to full in just a few minutes. It can charge and discharge 33 times faster than lithium ion. Discharge is also crucial for things like cars that want vast amounts of power in order to pull away quickly.The capacity of the 2.3V Grabat is huge with around 1000 Wh\/kg which compares to lithium ion's current 180 Wh\/kg. The best part of all this is that these batteries should be ready to go by mid way through 2016.Laser-made microsupercapacitorsScientists at Rice University have made a breakthrough in microsupercapacitors. Currently they are expensive to make but using lasers that could soon change.By using lasers to burn electrode patterns into sheets of plastic manufacturing costs and effort drop massively. The result is a battery that can charge 50 times faster than current batteries and discharge even slower than current supercapacitors. They're even tough, able to work after being bent over 10,000 times in testing.Sodium-ion batteriesSodium-ion batteries, that use salt, have been used in laptops following the creation of a prototype by the French network of researchers and industrial firms called RS2E.This battery uses a standard that means it can be placed in laptops and even work in electric cars like the Tesla Model S.The exact method of build and how it works are being kept secret but the 6.5cm battery can manage 90 watt-hours per kilogram, making it comparable to lithium-ion but with a 2000 cycle lifespan, which should be improved.Foam batteriesThe future of batteries is 3D. Prieto is the first company to crack this with its battery that uses a copper foam substrate.This means these batteries will not only be safer, thanks to no flammable electrolyte, but they will also offer longer life, faster charging, five times higher density, be cheaper to make and be smaller than current offerings.Prieto aims to place its batteries into small items first, like wearables. But it says the batteries can be upscaled so we could see them in phones and maybe even cars in the future.\u00a0Solid-state batteriesScientists at MIT, working with Samsung, have discovered solid-state batteries that are better than current lithium-ion efforts. These batteries should be safer, last longer and offer more power.Current lithium-ion batteries rely on an electrolyte liquid to transport charged particles between the two electrodes. It's this liquid that can be flammable and which degrades the battery, limiting life.According to the MIT report these new batteries could be charged for hundreds of thousands of cycles before degrading. They could also provide a 20 to 30 per cent improvement in power density meaning that much more charge for whatever they are powering. And they aren't flammable so they're ideal for electric cars.Nano 'yolk' triple capacity and charge in six minutesScientists at MIT have created a battery that triples the capacity of current offerings and can charge to full in just 6-minutes. It also does not degrade rapidly over time meaning it should last a long while.The icing on the cake here is that production is inexpensive and easy to scale, so we could see the batteries appear soon.Aluminium graphite charges to full in one minuteScientists at Stanford University have developed an aluminium graphite battery that could replenish to full in a smartphone in just a minute.Their aluminium graphite batteries are flexible, long lasting and charge ridiculously fast.The only issue is they hold about half the power of a current lithium battery, but with charging to full in just a minute that's not too much of a problem.Alfa battery lasts 14 days\u00a0and\u00a0runs on waterA breakthrough in aluminium-air batteries means that in the future\u00a0we should\u00a0see the release of the Alfa battery that has 40 times the capacity of lithium-ion.This battery will be able to recharge by simply being topped up with water, be it salty or normal. It should last a hefty 14 days, according to its creators Fuji Pigment and will be out later this year.We'd expect to see these batteries appear in cars first - imagine a fuelling station being anywhere with a water tap. Hopefully mobiles will be next in line.\u00a0While the aluminium-air battery has a whopping 8,100W\/kg capacity and lithium-ion has 120-200Wh\/kg it's still lithium-air that comes out on top with 11,400Wh\/kg \u2013 although when this will be available isn't clear.Flexible battery\u00a0A team at Arizona State University have come up with a flexible battery using the ancient Japanese art of Kirigami.The result means smartwatches could use a flexible strap battery for longer life and smaller build.\u00a0Looking a little further forward it'll be ideal for weaving power into smart clothes that monitor our health.The initial battery prototype is slightly larger than it could be, meaning it's less flexible too. Despite this the scientists managed to power a Samsung Gear 2 using a flexible band with the batteries inside. This was stretchy enough to move from the wrist to the bicep, and move with flexing, while still powering the smartwatch.The key here is that this uses current tech but just changes the way it's developed. For that reason it could be mass-produced today. Get ready for thinner smartwatches plus clothing with brains and power built in, soon.Skin powerUsing 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 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.Lumopack charges an iPhone 6's worth in 6-minutesThe Lumopack is a portable battery that's all about fast charging. The battery can fill up in just 6 minutes with enough to charge an iPhone 6 fully. Yes the iPhone will take longer to drain that power from the battery but you'll have the Lumopack ready in that short time.\u00a0The Lumopack, from Lyte Systems, will be fully charged in just 30-minutes. This is thanks to its charge rate at 140W, making it double the nearest competitor.The Lumopack will be available from $90, which is about \u00a363, and ships in March.Foldable battery is paper-like but toughThe Jenax J.Flex battery has been developed to make bendable gadgets possible. The paper-like battery can fold and is waterproof meaning it can be made in clothing or wearables.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 charginguBeam 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\u00a0was 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.Water dew powered batteriesThis one is still in the early stages but MIT scientists have found\u00a0a way to harvest power from water dew (as pictured at the top of the page).The device uses interleaved flat metal plates to produce power from the water dew in the air. Initial tests have produced small amounts of power, at 15 picowatts, or\u00a0trillionths of a watt. But this can be tuned easily, says postdoc Nenad Milijkovic heading the project, to produce at least 1 microwatt.While this small amount of power isn\u2019t going to replace your charger, or keep it powered all day, it will be useful in more remote locations where no other power source is available and time isn't too much of an issue. A charger the size of a coolbox lid should be able to fully charge a phone in 12 hours.StoreDot charges mobiles in 30 secondsThe StoreDot charger, which works with current smartphones, was developed by StoreDot, a start-up born from the nanotechnology department at Tel Aviv University. The demo was made using a Samsung Galaxy S4 with a standard battery.The superfast charging time was achieved\u00a0using technology StoreDot has been developing. This includes biological semiconductors made from naturally occurring organic compounds known as peptides \u2013 short chains of amino acids - which are the building blocks of proteins. Similar to those used by body builders to grow bigger faster.StoreDot also plans to release a charger capable of replenishing an electric car to full in just three minutes.StoreDot will cost about \u00a320 to make and should arrive in 2017.Transparent solar chargerAlcatel has demoed a mobile phone with a transparent solar panel\u00a0over the screen that would let users charge their phone by simply placing it in the sun.Although it's not likely to be commercially available for some time, the company hopes that it will go some way to solving the daily issues of never having enough battery power.The phone will work with direct sunlight as well as standard lights, in the same way regular solar panels.Energous WattUpRevealed at CES 2015 the Energous WattUp is a router-like device that also uses radio waves to transmit but rather than data it dishes out power. A small adapter chip on the receiver device will allow it to harvest the energy from over the air at up to 20-feet away.\u00a0The catch? This won't be available for some time. But that could be a good thing as it gives gadget manufacturers time to include the charging chips in phones and the like so you don't need to add that on.Aluminium-air battery gives 1,100 mile drive on a chargeA car has been tested that managed to drive 1,100 miles on a charge. The secret to this super range is a type of battery technology called aluminium-air. This uses oxygen naturally occurring in the air to fill its cathode. This makes it far lighter than liquid filled lithium-ion batteries\u00a0to give car a far greater range.Aluminium-air batteries drain turning the metal into aluminium hydroxide which can then be recycled to make new batteries. That will mean swapping out batteries every few months. But since it's so much lighter and cheaper than current efforts it should offer huge mileage and be affordable.With the car industry throwing money at battery developments it might not be long before we see this tech under our bonnets.Urine powered batteriesThe Bill Gates Foundation is funding further research by Bristol Robotic Laboratory who discovered batteries that can be powered by urine. It\u2019s efficient enough to charge a smartphone which the scientists have already shown off. But how does it work?Using a Microbial Fuel Cell micro-organisms take the urine, break it down and output electricity - to put it simply. On a scale large enough to charge a smartphone there are several cells into which the urine is passed via tubes. The unit creates electricity and also expels a broken down version of the waste making it safer to dispose of.With Bill Gates working on re-inventing the toilet we're expecting the porcelain throne to become a source of power in the home soon.Sound poweredResearchers in the UK have built a phone that is able to charge using ambient sound\u00a0in the atmosphere around it.The smartphone was built using a principle called the piezoelectric effect. Nanogenerators were created that harvest ambient noise and turn that into electric current. Effectively the phone can be powered from waste noise found around us all the time.Impressively the nanorods respond to the human voice meaning that those chatty mobile users out there could actually be powering the phone as they talk. Maybe this will cause a resurgence in phone calls over messaging.Tag Heuer Meridiist Infinite solar charged phoneTag Heuer has released\u00a0a new version of its Meridiist luxury phone that uses solar to power\u00a0the device.Wysips Crystal is a transparent photovoltaic component placed between the screen's and the LCD screen. It is invisible to the naked eye but the thin layer of cells charge automatically when exposed to light from the sun or artificial. They then power the battery.The Meridiist Infinite was only released as a limited run, unfortunately.Twenty times faster charge, Ryden dual carbon batteryPower Japan Plus has already announced this new battery technology called Ryden dual carbon. Not only will it last longer and charge faster than lithium but it can be made using the same factories where lithium batteries are built.The batteries use carbon materials which mean they are more sustainable and environmentally friendly than current alternatives. It also means the batteries will charge twenty times faster than lithium ion. They will also be hardier with the ability to last 3,000 charge cycles, plus they are safer with lower chance of fire or explosion.Power Japan Plus has said it will begin producing 18,650 Ryden cells soon. Hopefully we'll start seeing these appear in mobile devices soon.Organic battery, 97 per cent cheaper to makeOne possible future of power could be in organic batteries\u00a0if 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.Sand battery gives three times more battery lifeThis alternative type of lithium-ion battery that uses sand\u00a0to achieve three times better performance than current efforts.The battery is still lithium-ion like that found in your smartphone, but it uses sand instead of graphite in the anodes. This means it's not only three times better performing but it's also low cost, non toxic and environmentally friendly.Now for the science part. Scientists, at the University of California Riverside, have been focused on nano silicon for a while but it's been degrading too quickly and is tough to produce in large quantities. By using sand it can be purified, powdered then ground with salt and magnesium before being heated to remove oxygen resulting in pure silicon. This is porous and three-dimensional which helps in performance and, potentially, the life-span of the batteries.Sodium-ion batteriesScientists in Japan are working on new types of batteries that don't need lithium like your smartphone battery. These new batteries will use sodium, one of the most common materials on the planet rather than rare lithium \u2013 and they'll be up to seven times more efficient than conventional batteries.Research into sodium-ion batteries has been going on since the eighties in an attempt to find a cheaper alternative to lithium. By using salt, the sixth most common element on the planet, batteries can be made for cheaper and we won't need to worry about lithium running out. With battery-powered cars on the increase it's only a matter of time before lithium becomes too rare and expensive.Commercialising the batteries is expected to begin for smartphones, cars and more in the next five to 10 years.Upp hydrogen fuel cell chargerThe Upp hydrogen fuel cell portable charger\u00a0is available now. It uses hydrogen to power your phone keeping you off the gird and remaining environmentally friendly.One hydrogen cell will provide five full charges of a mobile phone (25Wh capacity per cell). And the only\u00a0by-product produced is water vapour. A USB type A socket means it will charge most USB devices with a 5V, 5W, 1000mA output.NTU fast charging batteryScientists at\u00a0Nanyang Technology University have created a battery that fast charges to 70 per cent in 2 minutes and has a life 10 times longer than current lithium-ion batteries.The NTU battery should last for 10,000 charges according to its creators.\u00a0The technology is currently being licenced by an unnamed company for production. While we'd love to see this in our phones soon the lead professor refers to electric cars when talking about the battery. "Electric cars will be able to increase their range dramatically, with just five minutes of charging, which is on par with the time needed to pump petrol for current cars,\u201d said Professsor Chen. The longer battery life makes sense for those buying an electric car.The 10,000-cycle battery should cut down battery replacement in cars and equate to a 15-minute charge for the entire car.NanobatteriesNanobatteries are 80,000 times smaller than a human hair and can offer three times the capacity of current efforts while charging in just 12 minutes and working for thousands of cycles.The nanobattery breakthrough was made by creating tiny "nanopores" that act like lots of little batteries which, in a honeycomb structure, make a full battery.\u00a0The research was published by scientists at the university of Maryland who said: "We were blown away by the performance." They attributed the enhanced performance to the short distances the electricity needs to travel, making the batteries far more efficient.Batteries with built-in fire extinguisherIt's not uncommon for lithium-ion batteries to overheat, catch on fire and possibly even explode. The battery in the Samsung Galaxy Note 7 was reported to have exploded several times. It became such a huge problem that Samsung had to stop production. Researchers at Stanford university have come up with lithium-ion batteries with built-in fire extinguishers.\u00a0The battery has a component called triphenyl phosphate, which is commonly used as a flame retardant in electronics, added to the plastic fibres to help keep the positive and negative electrodes apart. If the battery's temperature rises above 150 degrees C, the plastic fibres melt and the triphenyl phosphate chemical is released. Research shows this new method can stop batteries from catching fire in 0.4 seconds.\u00a0Batteries that are safe from explosionLithium-ion batteries have a rather volatile liquid electrolyte porous material layer sandwiched between the anode and cathode layers. Mike Zimmerman, a researcher at Tufts University in Massachusetts, has developed a battery that has double the capacity of lithium-ion ones, but without the inherent dangers.\u00a0Zimmerman's battery is incredibly thin, being slightly thicker than two credit cards, and swaps out the electrolyte liquid with a plastic film that has similar\u00a0properties. It can withstand being pierced, shredded, and can be exposed to heat as it's not flammable. There's still a lot of research to be done before the technology could make it to market, but it's good to know safer options are out there.\u00a0Liquid Flow\u00a0batteriesHarvard scientists have developed a battery that stores its energy in organic molecules dissolved in neutral pH water. The researchers say this new method will let the Flow battery last an exceptionally long time compared to the current lithium-ion batteries.It's unlikely we'll see the technology in smartphones and the like, as the liquid solution associated with Flow batteries is stored in large tanks, the larger the better. It's thought they could be an ideal way to store energy created by renewable energy solutions such as wind and solar.\u00a0However, IBM and ETH Zurich beg to differ, and have developed a much smaller liquid flow battery that could potentially be used in mobile devices. This new battery claims to be able to not only supply power to components, but cool them at the same time. The two companies have discovered\u00a0two liquids that are up to the task, and will be used in a system that can produce 1.4 Watts of power per square cm, with 1 Watt of power reserved for powering the battery.\u00a0Zap&Go Carbon-ion batteryOxford-based company ZapGo\u00a0has developed and produced the first carbon-ion battery that's ready for consumer use now. A carbon-ion battery combines the superfast charging capabilities of a supercapacitor, with the performance of a Lithium-ion battery, all while being completely recyclable.\u00a0The company has a powerbank charger that be fully charged in five minutes, and will then charge a smartphone up to full in two hours.Google, Apple and TeslaIt'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.\u00a0Tesla is constantly innovating in the battery space to help improve the efficiency and performance of its electric sports cars. The company managed to produce a 100kWh battery that lets the Model S accelerate to 60mph in just 2.5 seconds, making it the third fastest production car ever built.Apple is rumoured to be working on batteries, potentially, for a future Apple Car.READ:\u00a0Which mobile battery charger is best for you?