Anker Power Bank 20000mAh Review: The Power Plant in Your Pocket

There's a class of power bank that promises to charge everything you own and then disappoints you with sluggish speeds and mediocre capacity. The Anker 20000mAh, priced at $69.99, isn't one of those. With 87W of total output across three ports, it can juice up a MacBook Air while simultaneously charging two phones — a capability that used to require much larger, heavier bricks.

At 500 grams, it's not light, but it's remarkably compact for what it delivers. We carried it in a laptop bag for three weeks and never found it burdensome. The trade-off between capacity and portability is one every power bank makes; Anker got the balance right here.

The 87W USB-C port handles laptop charging with ease. We topped off a MacBook Air from 20% to full in roughly 90 minutes, which is only slightly slower than the original charger. The dual USB-C ports and single USB-A port provide flexibility for charging multiple devices, and Anker's PowerIQ technology intelligently distributes power based on what's connected.

20000mAh translates to roughly four full charges for most smartphones or one and a half charges for a MacBook Air. The digital display shows exact remaining percentage, eliminating guesswork about how much juice is left. Pass-through charging works reliably, letting you charge the power bank while it charges your devices.

The Anker 10000mAh at $21.99 offers half the capacity at a third of the price — perfect if you don't need laptop charging. The RAVPower 20000mAh offers similar specs but lacks Anker's PowerIQ intelligence. For laptop users who need serious portable power, the Anker 20000mAh remains the best value proposition.