Patent ID: 7962776

Claim:
A method to detect component removal while operating in a battery backup mode, comprising the steps of: providing a control card comprising a control card memory device, wherein said control card is interconnected to a battery backup unit (BBU) comprising a processor, event log, a BBU release pin, and one or more batteries; providing power from said battery backup unit to said control card memory device; and measuring the current drawn by said control card memory device; generating an early power off warning signal by said power supply; providing said early power off warning signal to said processor; if the current drawn by said control card memory device is less than or equals a pre-determined disconnect current, determining if said BBU release pin has been asserted; if the current drawn by said control card memory device is less than or equals said disconnect current and if said BBU release pin has been asserted, encoding in said event log a battery backup removal event.