When I put my '06 GL1800 away for the winter, I had it connected to a battery tender in a heated ( 58°)garage. A couple nice warm days ago, I decided to unleash it to wash and summerize it. The Battery Tender green light was flickering like a strobe light and the trike showed no power, key on. I hooked a spare Tender for a few hours and turned the key. I had power to the instrument cluster. Will the Tender eventually revive the battery?