Batteries that swap liquid electrolytes for solid materials promise to charge faster, last longer, and (crucially) run cooler. The rise of the lithium-ion battery, which powers everything from the smallest personal electronics to gargantuan energy storage systems, has been nothing short of revolutionary. But as anyone who's boarded a plane in the last decade could tell you, storing and pumping out energy by moving charged lithium ions through a liquid electrolyte soup has its drawbacks, not least that the batteries have a troubling tendency to catch fire. Enter the solid-state battery, which swaps liquid for a solid ceramic or polymer, creating power packs that charge faster, last longer, cram more energy into smaller spaces, and (crucially) run cooler. A new generation of companies aim to bring such batteries to market, and if their bets pan out, the tech could substantially ease the shift away from fossil fuels. Solid-state batteries have been "just a few years away" for more than a decade now.

Look Up Mashable's Best: E-readers, robovacs, laptops, earbuds, smart home and more Getting Technical with Mashable Mashable Selects Gift Ideas For Everyone On Your List Say More Versus Trending Now In My Bag Mashable @Home Top creators, ranked Creator Playbook All Series Home Depot's early Black Friday sale is here to take the sting out of your next DIY project. Brittany is fueled by horror, rainbow-sugar-pixel-rushes, and video games. Until her dying breath she'll be wielding a BFG made entirely of killer drive and ambition. Check out her work at PfhorTheWin.com. Like a fabulous shooter once said, get psyched!

Plus: The FBI has arrested an OpenAI engineer accused of snooping. The US military's race to make fake blood In February 2007, a US military helicopter carrying blood to a field hospital was shot down in Iraq, killing all seven crew members. The mission was a reminder of the risks of transporting blood, which has a limited shelf life and is often in short supply. Now, a $73 million DARPA effort aims to create shelf-stable versions of plasma, platelets, and red blood cells. The idea is to develop dried blood products that can be stored for long periods and deployed quickly on the battlefield. The project aims to have bags of dried blood products deployed in the field by 2029.

Say More Mashable's Best: E-readers, robovacs, laptops, earbuds, smart home and more Look Up Mashable @Home Trending Now Mashable Selects Top creators, ranked Gift Ideas For Everyone On Your List Creator Playbook In My Bag AI at School Safety Net All Series Before you toss a charger into your travel bag, check the rules for bringing it aboard. Olivia Tauber is the deputy editor of digital culture, covering creators, media, movies, beauty, and more. Based in New York, her work has appeared in The New York Times, Vanity Fair, The Cut, Teen Vogue, Complex, and Interview Magazine. She holds a Master's degree in Journalism from NYU and a Bachelor's from the University of Michigan. She also runs Fan Mail, a weekly pop-culture newsletter.

This maxed out iPhone requires two hands to use. This maxed out iPhone requires two hands to use. We earn a commission if you buy something through an affiliate link. Apple's largest Pro iPhone gets its biggest battery upgrade yet to make it a true two-day phone with new Siri AI and a variable aperture camera. The iPhone 18 Pro Max is the supersized sibling of the regular 18 Pro and, though it is no longer Apple's most expensive phone thanks to the £2,000 iPhone Duo, it has a similarly large price tag to match costing from £1,299 (€1,599/$1,299/A$2,299). The 18 Pro Max follows the familiar formula of its Pro Max predecessors: take everything that's great about the 18 Pro and supersize the screen and the battery.

Our gifting experts are obsessively searching for holiday gifts that are unique, thoughtful and suitable for any budget. Ring's new smart lock has a manual fallback that can't lock you out - how it works The brand just announced a smart lock with a manual'power dial' that charges the device in case it dies. Maria Diaz is a staff writer with a passion for home automation, smart home devices, and tablets. Ring's first-ever smart lock addresses a real weakness in the device category with a hand-powered energy dial. The lock also supports PIN, fingerprint scanning, Alexa, and the Ring app to unlock.

Mashable's Best: E-readers, robovacs, laptops, earbuds, smart home and more Mashable @Home Look Up Trending Now Mashable Selects Say More Top creators, ranked Gift Ideas For Everyone On Your List Creator Playbook In My Bag AI at School Safety Net All Series Prime Day is here to help you save on your next DIY job. Brittany is fueled by horror, rainbow-sugar-pixel-rushes, and video games. Until her dying breath she'll be wielding a BFG made entirely of killer drive and ambition. Check out her work at PfhorTheWin.com. Like a fabulous shooter once said, get psyched!

Mashable's Best: E-readers, robovacs, laptops, earbuds, smart home and more Trending Now Look Up Mashable Selects Say More Top creators, ranked Gift Ideas For Everyone On Your List Creator Playbook In My Bag AI at School Safety Net Versus All Series Prime Day is here to help you save on your next DIY job. Lois Mackenzie is a freelance reporter at Mashable. Over the years she has written for many publications, covering everything from the local news to the best pair of running shoes. You can find bylines in publications including Fit&Well, Metro, and Coach magazine, usually covering deals on everything from earbuds to TVs, or guides on how to beat your half marathon time. All products featured here are independently selected by our editors and writers.

Plus: the Pentagon has tapped Elon Musk to co-lead a future warfare project. An AI "mind-reading" tool can reconstruct what you're looking at based on a brain scan A new AI tool can guess what you're looking at just by analyzing your brain scans--and recreate that image with remarkable precision. It can go the other way too, and predict a person's brain activity based on what they're looking at. The researchers hope the "mindreading" tool could reveal more about how the brain works. It could also help locked-in people communicate and, incredibly, maybe even allow scientists to recreate the content of dreams. But other scientists warn that a similar approach could reveal people's inner thoughts and mental imagery, potentially without their consent.

From e-bikes to stoves, here's how companies are adding energy storage in surprising ways. If you want to install a big battery in New York City, you have to cut through a notoriously tough tangle of regulations. That's made it difficult to get large energy storage projects on the grid. Faced with those obstacles, some startups are getting creative, finding ways to use relatively small batteries in unexpected places, from induction stovetops to food carts. By deploying these more consumer-focused batteries, the companies are helping people directly, cutting pollution or power bills. And these units, while small on their own, could add up to a lot of capacity.