Getting Started With Your Vintage Macintosh – Garrett Fuller
If your vintage Mac is suddenly living in 1956 (or 1904, 1984, etc.) every time you turn it on, the PRAM battery is likely dead. 2. The Danger Component (Soldered vs. Holder) MACINTOSH PRAM BATTERY
A leaking battery can leak hazardous electrolyte onto the motherboard, potentially destroying the computer. Getting Started With Your Vintage Macintosh – Garrett
If you're working on a specific model, I can tell you if its PRAM battery is or in a holder . Do you know the model of your Macintosh? Are you trying to replace a dead one? MACINTOSH PRAM BATTERY