I have an original modified teac a-l700p power amp done by vinnie Rossi himself of red wine audio confirmed with himself email can be shown carried out 2005 I have just replaced/upgraded the 12v 5ah batteries to two new high quality yuasa 7ah batteries for longer life better current and sla charger batteries and charger alone £100 thinking £200 as it's one off not seen one before thanks for looking any questions or pics can be provided