Basic, only for dummies…
I do not garantee this is the safest and accuratest way, but sometimes, with small light drones, like my test drone, it’s difficult to use the Ampmeter tool, values displayed fluctuate too much.
This example for 3S 11.1V 3300mAh battery
- Full charge your battery.
- Connect to MP, select INITIAL SETUP…Optional Hardware…Battery Monitor and type your battery capacity (3300mAh).
- Look at the value in the field Amperes per Volt (default is 17) and remember it.
- Using a telemetry solution, like yaapu, you will see the capacity indicated in MP (point 2 above) 3300mAh and the capacity used (0 before the flight).
- Proceed to a standard flight (loiter mode) and wait your battery reaches the defined lower limit in voltage (10.5V in my case).
- Look at the Remote Control display and note the % and mAh of battery remaining. In my example, with Amperes per Volt set to 19, I read 1.97mAh in the script display, and 40% battery remaining.
- Full charge again your battery and look at the charger’s display how much Ah were injected in the battery, in my example 2.28Ah.
- Compare the value of point 7 (1.97Ah) with the “real” value of point 8 (2.28Ah). If this last value is higher at the one displayed in the sript display, increase the Amp per Volt value until you reach the “real value”, and proceed to a new flight. In my case Amperes per Volt needs to be set to 23.
Hope it helps someone.