I have been using clamp meter to measure current draw in my high voltage 8-12S powered models for years, while ago bought 2nd. one just to confirm the figures.
Lot easier than using Eflite meter that I have to hook up inline, using special jumpers I use for different type on lover voltage models, 2-6S, but showing also Voltage, Wattage, Amps and under various load figures.

Easy current check with clamp type.



Lower Voltage 6S check by Eflite inline meter of twin 90mm Ruski tank.

Thorough check of all parras before flying action is a must!