Placed the kissbox case in my pocket and felt weird that it was feeling hot. So i took it out and got a shock. One of the batteries felt extremely hot and my thumb got burnt.

Immediately I flicked the battery out of the case and within a minute it was on fire!!

Is this due to a battery leak? I have not charged both batteries for 2 days.

Hope this is an isolated issue. Imagine if i did not take it out and kept the case in my pocket!