When it comes to price per hour of battery life, Acer’s $199, 14-inch Aspire One Cloudbook has every other system beat. On Laptop Mag’s Battery Test, the Cloudbook lasted a staggering 14 hours and 43 minutes on a single charge, 2.5 hours more than the next-closest budget machine, the Asus X205. You also get a big 14-inch screen, a sturdy body, a full-sized keyboard and Windows 10 instead of Chrome OS. So if you’re looking for an affordable system that doesn’t need to be tethered to an outlet, this is the laptop for you.