Been using a battery tender for years, this Optimate 5 is much better than those other guys. My wife killed her battery on her Honda Shadow last year and within 5 minutes we were back on the road. Her car battery died a little while later (someone needs to remember to turn their lights off) and I was able to get the car started quick too.

I always leave my bike plugged into this when I'm not riding and it always starts in the morning!