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Woot has dropped the price of the Amazon Basics 20,000mAh portable charger in black to $12.99 from $38.99, making it considerably cheaper than the $34.85 the same model currently costs elsewhere. You also get free standard shipping if you’re a Prime member (while everyone else pays $6), but keep in mind Woot doesn't deliver to Alaska, Hawaii, P.O. boxes, or APO addresses.
For that price, you're getting a fairly substantial backup battery that measures 4.48 by 2.83 by 1.16 inches, making it compact enough to slip into a backpack or tote, although its 0.77-pound weight might make it a little bulky for a jacket pocket. The trade-off is a fairly generous 20,000mAh capacity that should be enough to recharge a typical smartphone several times, making it particularly useful for camping trips or long weekends when access to power outlets is limited. And since you're likely to have more than just your phone with you on those trips, the charger comes with two USB-C ports and one USB-A port, allowing you to charge up to three devices at once.
When used individually, either USB-C port can deliver up to 20W, enough to fast-charge many modern smartphones, while the USB-A port tops out at 12W, making it better suited to older devices and smaller accessories. The catch is that connecting two or three devices reduces the total output to 15W shared across the ports, so charging everything together will take longer than plugging in one device at a time. Both USB-C ports can also be used to recharge the power bank itself, which takes around 4.4 hours, and the box includes a 1-foot USB-C to USB-C cable for charging (it won’t transfer data).
All said, anyone hoping to charge a laptop will need a higher-wattage model, but for occasional travel, commuting, or keeping your phone running during a long day, the capacity and price make a reasonable combination.