China battery

This battery is 5 month old. I use summer this in our electric motor on boat. In autumn it was relief battery in my tractor. It was half loaded, when I decide to load it full. I have automatic loader, which does not put battery over full electric. It was loaded battery over night and in this morning we heard something to exploding like a tire or rabbit gun. In our carage my wife found this China-made battery, it was near her car. Without any command, I promise to wash soon car, and wash clothes and dishes and clean our house and be inoffensive every way to future.