Smartphone batteries are lasting longer than ever, but they still have their limits. Battery-saving modes only add so much time to the clock. If you plan on spending an extended time away from an outlet, you might want to think about other ways to keep your phone alive. That’s where a handy power bank comes in, but there are heaps of them to choose from. Here are our picks for the best 10,000mAh power banks you can buy.
