Hello everyone. Two months ago I went out for the snow on my rennie, after warming her up pretty good, because it was the first ride since last winter. I drove carefully about 1,5km and suddenly I could hear her losing rpm’s, and she was doing hiccups and eventually died after 10 secs. I went back for my booster, because it seemed that there was no power left in the battery because the lights on the front or the dash wouldn’t light up. With the booster on it would crank but not start, I took it home and let it charge overnight. After it had charged overnight, I tried to start it, but this time it wouldn’t crank, only make a clicking noise repeatedly. What could be the problem here?

Thanks in advance.