px4-firmware/msg/battery_status.msg

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uint64 timestamp # time since system start (microseconds)
float32 voltage_v # Battery voltage in volts, 0 if unknown
float32 voltage_filtered_v # Battery voltage in volts, filtered, 0 if unknown
float32 current_a # Battery current in amperes, -1 if unknown
float32 current_filtered_a # Battery current in amperes, filtered, 0 if unknown
float32 average_current_a # Battery current average in amperes, -1 if unknown
float32 discharged_mah # Discharged amount in mAh, -1 if unknown
float32 remaining # From 1 to 0, -1 if unknown
float32 scale # Power scaling factor, >= 1, or -1 if unknown
float32 temperature # temperature of the battery. NaN if unknown
int32 cell_count # Number of cells
bool connected # Whether or not a battery is connected, based on a voltage threshold
bool system_source # Whether or not a this battery is the active power source for VDD_5V_IN
uint8 priority # Zerro based priority is the connection on the Power Controller V1..Vn AKA BrickN-1
uint16 capacity # actual capacity of the battery
uint16 cycle_count # number of discharge cycles the battery has experienced
uint16 run_time_to_empty # predicted remaining battery capacity based on the present rate of discharge in min
uint16 average_time_to_empty # predicted remaining battery capacity based on the average rate of discharge in min
uint16 serial_number # serial number of the battery pack
float32[4] voltage_cell_v # Battery individual cell voltages
float32 max_cell_voltage_delta # Max difference between individual cell voltages
bool is_powering_off # Power off event imminent indication, false if unknown
uint8 BATTERY_WARNING_NONE = 0 # no battery low voltage warning active
uint8 BATTERY_WARNING_LOW = 1 # warning of low voltage
uint8 BATTERY_WARNING_CRITICAL = 2 # critical voltage, return / abort immediately
uint8 BATTERY_WARNING_EMERGENCY = 3 # immediate landing required
uint8 BATTERY_WARNING_FAILED = 4 # the battery has failed completely
uint8 warning # current battery warning