he battery module of Delta Amplon RT 2kVA, DLT-GES042B109335 designed for use with UPS Delta Amplon RT 2kVA as an external battery for longer battery life. Inside the battery module installed 4 series-connected battery voltage of 12V and a capacity of 9Ah each. Housing material: metal frame with plastic front panel. Delta RT-2K-EBC Battery Unit for Delta RT Series 2kVA UPS