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Message: <blockquote data-quote="pm-r" data-source="post: 1649940" data-attributes="member: 175845">Depending on the Mac model, a multimeter will work but access may be a PITA!!The easiest way is to use the Date & Time System Preferences, set the date and time using the auto-set checkbox option, then disable that auto-check/set option, shutdown and unplug the power from the Mac and leave it unpowered for at least 30 minutes, then the next time its powered up, check the date and time system pref and if its not the correct time the PRAM battery is probably kaput.IE: the correct date & time is one of the things kept in the battery held pram settings.</blockquote>

Verification: How many occurrences of a n-u-m-b-e-r between "d" and "f" in this example...(sdgs6ngklu3gd#f9%)?