Web page still shows the wrong adapter (130w with 7.4mm barrel connector, which will NOT fit the 16+ (7620) as compatible. As well, the web page for the 332-1829 charger does NOT list the 16+ (7620) as being compatible. I took a chance and ordered the 332-1829 (4.5mm plug, 130w). It arrived today and I can now confirm it is compatible with the 16+ (7620) laptop. It powers and charges the 16+ correctly. The 4.5mm socket location is much more convenient (left side near display hinge) than the USB-C socket, and the USB-C socket is now free to use with an external drive while the laptop is powered/charging from the 4.5mm 130w adapter.  
Hello, I recently purchased an "Inspiron 16 Plus 7620".  Specs are i7-12700H, 40gb 4800MHz ram, 16" 3k display, Intel Iris Xe graphics, 1tb pcie nvme ssd, 6-cell 86WHr battery. The system came with the 130W USB-C charger.  This works fine but prevents use of the Thunderbolt port since that's where it connects.  I would like to purchase a power adapter which uses the 4.5mm barrel socket (left side of laptop, near display). Going to the support page and using my Service Tag, the Accessories page identifies an alternate supply as compatible, the "180W, 7.4MM barrel connector" (Dell part 450-AGCU)."  This appears to be an error, because that supply has a 7.4mm barrel connector and won't fit the Inspiron 16 Plus (7620)'s 4.5mm power port. Searching Dell accessories without my service tag, I did find a "4.5mm barrel 130W AC adapter" (Dell part 332-1829).  The stated specs seem correct for the Inspiron 16 (7620):  130W, 4.5mm barrel, 19.5vdc, 6.7A output all matches what the Inspiron 16 Plus (7620) specifications say it needs. But Dell lists the 332-1829 as only compatible with certain Inspiron 13, XPS5 and Precision models, and not the 7620. Does anyone know what 4.5mm barrel AC adapter is the correct one for Inspiron 16 Plus (7620)?    
Inspiron 16 Plus 7620 POWER SUPPLY