Finding myself far from an outlet when my phone hits five percent makes me feel shaky, but luckily part of my job involves testing portable batteries so I usually have a few on hand. After spending the past year and a half testing over two dozen units to determine the best power banks for various scenarios, I’ve compiled a list of the top options. From partial recharges for iPhones to massive laptop batteries for fieldwork, having a reliable power bank is essential for travelers and forgetful individuals. The Anker MagGo Power Bank, equipped with Qi2 technology, is the best MagSafe battery I’ve tested, bringing an iPhone from near-dead to half-full in just 45 minutes. Another noteworthy option is the Anker Nano Power Bank, which delivers a quick charge in a small, ultra-portable package. For medium-capacity power banks, the Otterbox Fast Charge is a stylish and reliable choice, performing almost as well as larger batteries at a lower cost. Ultimately, having the right power bank can save the day in moments of low battery anxiety.