RIIEYOCA 90 Degree 240 Watt DC Power Connector Adapter, 5.5mm x 2.5mm Female Plug to 5.5mm x 2.1mm Male Jack, for Laptop Power Connection Conversion(2-Pack)

I'm using this to charge a GoalZero Sherpa 100AC thru the "solar" port. There is very little info about the size of that port, but it is the 7990 (7.9mm x 9mm) type connector. I have a USB-C to 5525 cable with the 18v PD circuit, and this adapter. That frees up another USB-C port for output. Great combo and makes a big difference in today's devices that are leaning more to USB-C.

10/10 would buy if needed again. It also came with 2.

The plug end seems to fit a little loose in the socket on my telescope mount but I need to compare it to the existing battery cable plug from the manufacturer. Will raise it to 5 stars if I ordered the wrong size.

the center signal pin in 7.9mmx5.5mm barrel tip is not connected, so it only supports 90w.it should connect to outer pin to support 135w.or connect with 1.5K om to outer pin to support 170w.

Product worked exactly as described. Purchased to replaced faulty adaptors that came with an universal laptop PSU from Canada Computers, you know the one. Made the PSU actually usable.

Converted the adaptor output head to the correct size for my lamp, and also made the wire fit in at a right angle rather than standing out a mile!

good

Fast delivery and exactly as described in product information

I bought 4, 3 came with a 2.2mm ID not 2.1. This means they do not stay connected! Will be returning them. Sloppy QC.Also, the spring loaded contacts may be too weak, not sure.