ThinkJet 2225B battery pack question

[Steve Nichols]

To be clear regarding what I am thinking of doing, I just received a 9114b disk drive with a power brick that has its output wire running through the socket where the charger would normally plug in. I am sure that the battery in the battery pack has been removed and the wire from the power brick is connected directly to the plug that plugs into the socket on the disk drive. I received my 9114b from a well respected dealer in used HP calculator items. The disk drive is working well, and I believe will continue to work well. Therefore, I hope to create a similar arrangement for my Thinkjet.

There is a problem that the power brick has no markings to identify its specs. If I could I would look for the same power brick, assuming that the 9114 and ThinkJet use the same voltage. I am left with attempting to match the specs that have, kindly, been provided.

Steve N.