You need to build for loop to check the filed of struct is empty or not. You can use this code.
k = 1;
for i = 1:length(Charge)
if ~isempty(Charge(i).Voltage_measured)
ChargeNew(k).Voltage_measured = Charge(i).Voltage_measured;
ChargeNew(k).Current_measured = Charge(i).Current_measured;
ChargeNew(k).Temperature_measured = Charge(i).Temperature_measured;
ChargeNew(k).Current_charge = Charge(i).Current_charge;
ChargeNew(k).Voltage_charge = Charge(i).Voltage_charge;
ChargeNew(k).Time = Charge(i).Time;
k = k + 1;
end
end
