The PowerShell is the first fully integrated power solution for cpap users that need a totally portable, integrated power source. It is small enough to fit in the palm of your hand but has enough power for a full night of cord-free cpap for most users. Soft, padded 2mm neoprene skin over a solid plastic skeleton ensures a secure fit Surrogate power plug for built-in charging using the standard Z1 power adapter Insert the battery module and the Z1 to create an integrated form-factor. Approved by the FAA for in-flight use. A full-night of battery power for most users. Get an undisturbed night of cpap. Z1 PowerShell includes: PowerShell Module, Battery Cradle, Neoprene Outer & lanyard, Overnite Battery, Battery Shuttle Click here for battery saving tips. Battery Module Specifications: PowerShell Dimensions Alone: 6"x 4.25" x 3" PowerShell with Battery and Attached Shuttle and Lanyard: 16.9 Ounces Battery Pack Content: Lithium Ion Battery with Attached Shuttle Weight: Approximately 9.8 ounces Battery & Attached Shuttle Dimensions: 4 Inches L x 3.75 Inches W x 1.5 Inches H (With Battery Shuttle) Battery Capacity: 45 Wh (Watt-hours) Battery Voltage: 14.4v (Volts) Estimated Run Time: Manufacturer tests showed the Overnight Battery included with the PowerShell powered the Z1 CPAP Machine set to a pressure of 14cmH2O for 8 hours of use. Actual battery run time will vary based on machine pressure, machine settings, and personal breathing, with a manufacturer reported maximum run time of 14 hours. Manufacturer reports the battery will deliver at least a "full night." Manufacturer defines "full night" as 4 hours. Replacement battery modules are available for purchase. Battery Operating Temperature Range: 41 to 95 degree Fahrenheit (5 - 35 degree Celsius) Estimated Charge Time of Battery If Fully Drained: Up to 8 Hours