During testing and maintaining activities on battery system, this external load unit can be connected to BTS 200 when a higher load current is necessary. This extra load allows different configuration to set the discharging current at different voltage level. When higher load current is necessary, it is possible to use the BTS 200 MKII in connection with external load ELU 200 MKII. ELU 200 MKII is an active programmable burden as BTS 2OO MKII. BTS 200 MKII allows the connection up to 9 external loads ELU 200 MKII.