Yes, you might be able to. 1 Top it up. 2 If it wasn't detected by the smart conditioning charger then try brute force with an old-fashioned dumb trickle charger or jumping from a vehicle with the engine running ≥ 3,000 rpm. 3 After a bit of that try it with the smart conditioning charger again. 4 This might force it back into life. But I would never rely on it anywhere that it mattered if it didn't start the engine. But as a low-current bench or workshop power source that wouldn't be the case. Jonathan