My bike is an '04, i changed the battery this year.. brand new. The previous owner had never changed it.
I use a charger once it a while.. that maintains the battery charged. I use it more when it gets colder outside or when i haven't used my bike in +- 3 days.
I got a gel one, its is not an OEM, but it had a higher amp that the one in there initially so i figured it was an added bonus.
I'll check the ground connections.. now connections with an s... how many are there? and where are they?
Your battery is most likely low or going dead. Mine did reset the computer every start when I first got it over a year ago. Got tired of that real quick. Charged the factory H-D battery over night on 2amps. Good To Go.
Same with my friends sealed H-D battery. Was dying. Charged it. GTG.