Is it possible to connect old batteri-units(from your 2005) to an new pulsar 1000C. The new head-unit should have alarm relay for UPS error, and one for batterimode.I have 4 head-units out of funktion, The head-units is called MGE Pulsar Extreme 1000C ART 5103170700, Ser: 881G12096 Extra relayboard: 66104. Is it possible to bay new head-units in sweden, bacause it is maybe the best way to solve the problem.