Many Macintosh 128k/512k/Plus battery sockets are damaged or corroded due to battery leakage in the past.
This is a drop-in replacement for the Macintosh 128k/512k/Plus battery socket.
Also known as part "CAPETRONIC DS 1011" and "815-0727-B".

This model supports both 3.7V 14500 and 1.5V Alkaline/Lithium batteries. Using a small custom build voltage regulator the output voltage remains 4.5V (which is the original battery voltage), regardless of the battery type (1.5V -> 4.5V). There is a 'ON/OFF' switch so you can bypass the regulator if wanted.

These devices are hand soldered and tested before shipping.