Grab Anker’s massive 20,000mAh Nano power bank for an all-time-low of $30

Anker’s Nano 20,000mAh slim power bank is down to $30 from its usual $55 at Woot, which puts it among the cheaper ways to grab a high-capacity battery with a built-in cable right now. If you want to get two, that’ll cost you $25 or just $25 each.

The 20,000mAh capacity is one of the best things about this power bank because that means it’s got enough juice to recharge your iPhone about 3-4 times over. On a flight, a road trip, or a packed day of errands, that’s the kind of cushion that means you’re not hunting for a wall socket every few hours.

The built-in USB-C cable is super convenient because it simply means there’s no separate cord to forget, tangle, or dig out of your bag. Of course, if you really want to and you know you’ll have to charge multiple devices at once, there are two extra ports available, a USB-C and a USB-A. Broad USB-C compatibility means it works with most modern phones, tablets, and accessories without issue.

30W output handles phones and tablets just fine, but it won’t do much for laptops. If you’re looking for a power bank that can also charge a MacBook, you’ll have to look towards other models, of course. Anker has plenty of laptop power banks that deliver at least 65W of power, but they’re typically a bit pricier. This 25,000mAh model with 165W total output is on sale for $120 at Amazon right now.

At $29.99, the Anker Nano power bank is an easy recommendation for travelers, commuters, or anyone who wants dependable backup power with one less cable to pack.