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Other common battery cell types can last significantly longer or shorter periods, such as the smaller CR2016 which will generally last about 40% less time than CR2032. Higher temperatures and longer power-off time will shorten battery cell life. When replacing battery cell, the system time and CMOS BIOS settings may revert to default values. However, it is common for the battery to be dead prior to the user actively replacing the battery and thus all BIOS settings require entry.Some computer systems may use other types of cell batteries such as the cylindrical "1/2 AA" used in the Power Mac G4. Visually inspect the motherboard to verify the type of battery being used before purchasing a replacement.