Knowing you’re able to charge your phone at any time, no matter where you are, should lift a weight off your shoulders and put some pep in your step when you’re out and about. That’s why you need a power bank, like this Iniu power bank that’s on sale for just $18 on Amazon, currently knocked down by 40 percent off its usual price. If you don’t have a power bank, this is a good one to snag. For starters, it’s super slim and compact, able to fit in your palm or slip into your pocket with ease. It’s also super lightweight, coming in at just 0.44 pounds, so you’ll barely even know it’s there. This…