Many early Macintosh computers, such as the Mac SE, have soldered PRAM batteries. While designed to last for many years, these batteries are now decades old and prone to leakage.
Getting Started With Your Vintage Macintosh – Garrett Fuller MACINTOSH PRAM BATTERY
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) Many early Macintosh computers, such as the Mac