Due to an illness and then a hurricane, I let my car sit in an enclosed garage with what I thought was a full main batty and a disconnected aux battery for over a year. Replaced aux battery, car went to ready status ok, but fuel gauge showed no bars. Put car on charge, charger kicked out within a couple hours with fuel gauge showing only 2 bars. Hooked up charger again, kicked out after a few minutes now showing 3 bars. Drive car, got about 5 miles per bar, brought her home with zero bars but no tortoise. Range shows 1 mile. Put her in ready state, put headlamps on. After 4 hours I figure that should use another bar. (1kWh). After about 30 mins tortoise came on and then when I checked after an hour tortoise had disappeared. So had READY indicator. Lights still bright after 1.5 hours. Shut her down and then back in ready mode .. tortoise and READY came back but after a few mins both went off. Decided to start charging cycle and not sure where that will end up. Do I have a malfunctioning gauge, or a bad main battery? Car has only done 25k and it's a 2012.