Mrs.T near new Yamahs Grand Filano Hybrid battery died, she did not make sure the thing was turned off, it doesn't use a key.
Took the battery back to dealer, they said it was finished.
Loooong story short, took the car and bike battery out connected them together for an hour, the bike battery now thinks it is part of the car battery.
Tested the bike battery, 9 volts, connected the smart charger, took about an hour, fully charged, still on the bike now, 2+ years......๐ค