Story of a battery

My life is always having full of event. This is one of them.

My car battery is having some problem since last week. But i thought everything is OK now.

My family planned to go to the alarms given ceremony on Saturday evening.
When i was try to get the car to the main entrance of the house , i have understood that car engine is not starting. Then i have found , battery was weak.
So i have borrowed a car from my sister and driven back to home.

At that nasty moment , wild idea of replacing sister's car battery with my car battery was occupied my mind. So i have replaced it and started the engine. Engined was started , and i was happy.

I have to hone inside the house to dress up. Within 10 minutes i have tried to start the engine again.
--Not starting --- So i have examined the battery.  It was so hot to tough even.
So i though now i need to buy 2 batteris , one for me and one for my sister.