Abstract: A flying vehicle with a battery pack associated with each propulsion module, not centrally located, that is plug and play, meaning it can be easily removed by hand and swapped with any other battery of same model and serial number and used within a propulsion module to power the propulsion system. The system includes battery management modules for monitoring battery pack voltage and evenly re-distributes power across all independent battery packs keeping each pack within relative voltage of each other. The packs within the vehicle are monitored for balancing so one pack cannot become too low in power as to not operate while the vehicle's other packs are still working.

Abstract: A method for performing CPR, comprising activating an application on one or more mobile phones having one or more sensors, placing one or more mobile phones on the finger of a subject to collect information about the subject, determining whether CPR is necessary based on the collected information about the subject, calibrating the sensors of the one or more mobile phones, placing the one or more mobile phones in a position on a hand of a user of the one or more mobile phones, administering chest compressions to the subject, activating a sensor of the one or more mobile phones, including an accelerometer sensor, to permit the application to capture information about the chest compression rate and displacement relating to movement of the chest of the subject, and transmitting the chest compression rate and displacement information of the subject to the emergency dispatcher using the mobile phone.