## Physical Device Driver Reference

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### POWER_GETPOWERSTATUS (60h) - ParmLength

ParmLength Contains the size of the Parameter Packet in bytes (including ParmLength). On input, it must be a value of 7 or 11 bytes. A value of 11 must be used to obtain BatteryTime and BatteryFlags information. These fields are only supported under APM version 1.1 and higher. A value of 7 is accepted for compatibility with existing code written towards APM 1.0.