I have a 200Ah lead acid battery so 200 is entered into my BVM-712. Is the battery percentage display showing 100% (fully charged state) to 0% completely dead and probably ruined? or is it smart enough to show 0% as 100 amps have been used (50% of total amps and probably down to 12.2v)? If the display shows 0% as completely dead and ruined, should I set the battery capacity to 100 instead if I want 0% to be displayed when 50% of the total amps have been used?