Pram Battery — Macintosh

While modern computers have straightforward BIOS batteries, the PRAM battery in vintage Macs was often hidden deep in the analog board or soldered, encouraging a "no user-serviceable parts" ethos. However, the community has kept these machines alive by finding modern replacements, like this Keystone Electronics 108 1/2AA Battery Holder. 4. Exceptions to the Rule

For anyone working with old Macs, the first step is often to "recap" the board and deal with the PRAM battery. MACINTOSH PRAM BATTERY

Getting Started With Your Vintage Macintosh – Garrett Fuller MACINTOSH PRAM BATTERY

Later Power Macintosh models often require a working PRAM battery to function properly. MACINTOSH PRAM BATTERY

Enthusiasts often carefully cut or desolder these old batteries to remove them before they destroy the logic board. 3. "Not User-Serviceable" (Technically)