For years, the Nimble Champ reigned supreme as our top portable charger pick. Now, its successor takes over the mantle, inheriting all the great features of the original while introducing welcome improvements. Weighing just 6.2 ounces, it’s one of the lightest options on the market, smaller than a deck of cards. It can charge two devices simultaneously via USB-C ports on both ends, delivering 20 watts of power. While the original Nimble was a trusted companion for years, the new version has quickly impressed with its durable construction, stylish speckled color finishes, and a bright lanyard loop for easy carrying and retrieval from your backpack. The Pro version offers a larger capacity of 20,000 mAh and a similar design with two USB-C ports capable of delivering up to 65 watts. There’s also a smaller version with a 5,200 mAh capacity and a power output of 15 watts. Beyond its performance, Nimble stands out for its commitment to sustainability. Batteries often rely on environmentally questionable materials, but Nimble uses bioplastics and plastic-free packaging to minimize its impact. The new version incorporates 90% recycled plastic and comes in smaller, plastic-free packaging. Nimble even includes a 3.3-foot USB-C to USB-C cable in the box. For those willing to invest in quality, the Anker 737 is a versatile and reliable powerhouse with an impressive 24,000-mAh capacity. Supporting Power Delivery 3.1, this power bank can deliver up to 140 watts to charge phones, tablets, and even laptops. It boasts a relatively compact size for its capacity but weighs in at 1.4 pounds. A circular power button on the side activates a digital display that shows the remaining battery percentage. Tapping it again reveals additional stats like temperature, total output, cycles, and more. The screen also displays wattage and an estimated remaining charge time when devices are connected. It fast-charged every device we tested, and you can charge up to three devices simultaneously without issue.