The Aukey 30000mAh Power Bank with Quick Charge 3.0 PB-T11 ($58 MSRP; $45 on Amazon) is the first very high-capacity battery with the right mix of size, weight, and features for laptop recharging. It’s only drawback is that it can’t recharge a Mac laptop unless it’s sleeping, because it lacks support for USB Power Delivery 2.0, which can pass through high wattages needed to charge a laptop while it’s in use.
Packing 30,000 milliampere hours (mAh) or 111 watt-hours (Wh), the Aukey showed in testing that it could deliver the equivalent of over 1.5 full charges for a 2016 12-inch MacBook or deliver more than a full charge to the 13-inch MacBook Pro with Touch Bar. My 2015 12-inch MacBook recharged at a rate between 7Wh and 8Wh per hour, which translates to a couple of hours of low-intensity, low-brightness use per each hour of charging.
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