Vehicle: Audi A3 1.9 TDI 77 kW BKC, EDC16U1 (03G 906 016 J ver.5497)

I'm getting ready for EDC16U1 reflashing with factory .sgo file and with Abrites Avdi tool and software.

To stabilize voltage and supply the power to battery I will use Flash-mem 60 with flash mode. I don't know which option is best to set for voltage (it has 3 options: 13.8V, 14.4V and 14.8V). Also I don't know which current to choose (5A, 15A,30A and 60A)?
What else I have to look out while reflashing ECU software)?

Please can you help me with advice.