CONCORDE Battery Tester. The BC-9000 has been designed to provide the operator with accurate battery charging with ease of operation. Charger Features Include: adjustable output from 3.0 to 36.0 Vdc (0.1 steps), adjustable output amperes from 0.05 to 25 Adc, constant voltage or constant current charge, adjustable charge time from 1-999 min, and single or two step charge routine. Common features include: universal AC power input 90