Does the current calibration can be perform at 3.5 Amp instead of 2 Amps?

HI I'm currently performing a charge current test to a battery pack at 3.5 Amps and noticed a lot of variation between the  DMM and fuel gage.

Noticed that the error at 2 Amps  is 11 mA but when I rised the charge current to 3.5 Amps the error doubles to 22 mA. I want to know if it' spossible to calibrate the current to 3.5 Amps to avoid discrepancies between calibration and testing. 

Thanks.