article_snippet.sent: The first is the battery itself is damaged and although the battery itself is connected to a charger the battery itself isn’t actually charging. 
article_snippet.sent: A short circuit is another possible cause but this is a less likely unless the phone has been illegally modified in some way.
article_snippet.sent: The most common cause  is improper charging.
article_snippet.sent: The most common cause   affects lithium batteries more where the phone may be fully charged but is left on charging or if phone is used whilst charging may lead to lithium batteries overheating.
article_snippet.sent: Tips include to avoid using the phone while the battery itself is being charged by disconnecting the phone from charger before connecting a call or using any of a call functions.
article_snippet.sent: Ensure it is not over-charged by removing the electric supply when the battery itself is fully charged.
article_snippet.sent: If the battery itself seems to have swollen, the battery itself should be replaced immediately.
article_snippet.sent: Hanghang said: 'It was the battery itself.
highlights_snippet.sent: Experts blame battery as most likely cause of blast .