I needed a 20V DC adapter for a Lenovo Tiny-In-One which I put together using two items I bought on Ebay - a monitor and a tiny computer that fits into the monitor fits. They each came with their own 12v adapter but when I combined them I got an error message saying more voltage was needed. Found this on Revain and it works great.
Fast Charging Made Easy with Quick Charger COMMO 20W Compact Charger USB-C
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Dell XPS 15 & Precision M3800 Genuine 130W Slim Power AC Adapter - High-Quality Charger for 9530, 9550, 9560, 9570, 5510, 5520, 5530 Laptops (HA130PM130/DA130PM130)
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14" Notebook ASUS VivoBook 14 X415EA-EB1313W 1920x1080, Intel Pentium Gold 7505 2 GHz, RAM 4 GB, DDR4, SSD 256 GB, Intel UHD Graphics, Windows 11 Home, 90NB0TT2-M00DT0, gray
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6" E-book Amazon Kindle PaperWhite 2018 1440x1080, E-Ink, 8 GB, Standard Equipment, sage
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