Photo: Amelia Holowaty-Krales/PolygonCameron Faulkner (he/him) is Polygon’s commerce editor. He began writing about tech and gaming in 2013, and migrated from The Verge in 2023.If you’ve got some holiday travel coming up, you might need a portable battery to keep your devices charged when you’re away from an outlet. Whether you have a Steam Deck, a Nintendo Switch, a phone, or a tablet (or perhaps some combination of that lineup), you shouldn’t settle for a battery that’s low on charging speed or capacity. This blue-colored Baseus battery has both, packed with 20,000mAh with charging speeds of up to 65 W, and it’s selling for $33.59 at Amazon.Baseus 20,000mAh 65 W portable USB-C battery$34$6043% off$34It’s common for this battery to get a discount that knocks $10 or sometimes $15 off its normal price, but a deal that takes nearly 50% off the total cost means we just had to tell you about it today. In order to get the deal, visit the battery’s product page, and, in order to stack the discounts, ensure you apply both the 30% off coupon as well as the checkbox near the green rectangle that says “Save 14%.” Once you arrive at checkout, the price before tax should be $33.59.Read More$34 at AmazonThe Baseus battery exceeds the speeds of the 45 W charger included with the Steam Deck. With 65 W in total (the wattage will be reduced if you have more than one device charging simultaneously), you can also provide speedy juice to a number of laptops that sip power through a USB-C port. It’s true that there are hundreds of batteries to decide between, but it never hurts to save money when you can, especially when doing so still gets you the specs you may be after.