the only thing i think that you can do is emal the place where you got it from and see if they can do anything about your problem or you can just live with it and get on with your racing hoping it won't happen again.
i would suggest to write to the company and see what the can do. there might be a warranty on if not just ask around and see if anyone can fix it.
remember your worst case senaro is that you'll have to buy a new charger (yea that only $300 down the drain

)
also i might be a promlem with your house electrical sockets. try next time you charge your batteries do it in another room on the opposite side of the house.