1. Physical Damage to battery
Sometimes when a phone is dropped, the battery can sustain damage. This could change the internal mechanical or chemical structure of battery, which could cause short circuits, overheating, and other problems. When a battery is damaged, it frequently swells, which should be enough of a reason for you to discard it and purchase a new one.
2. Overnight Charging
The majority of us have the practise of charging our phones before going to bed. This wears down the battery since excessive charging can cause overheating, overcharging, short-circuiting, and occasionally explosion. Nowadays, many smartphones include a chip that cuts off the current flow after the battery is fully charged.
3. Manufacturing defect
The reason why phones blow up is also a manufacturing flaw. Before being sent, the handset Lithium-ion battery must undergo thorough testing. The battery may malfunction and explode as a result of a bad component or a manufacturing error. This typically occurs when thermal runaway occurs as a result of the battery cells reaching a critical temperature.
4. Client-inflicted injury
One such occurrence occurred with the Realme 5 last year, which is said to have burst while the user was operating his motorcycle. Upon inspection, the business asserted that the phone had been harmed by outside forces that had punctured the battery and damaged the motherboard. So, do not interfere with the components of phone in any way.
5. Overloading of Processor
Your phone may naturally heat up due to the processor as well. Even the most powerful chipset experiences thermal problems when multitasking and running graphically demanding applications like PUBG. OEMs have been including a thermal lock feature or thermal paste to control the heat of phone as a response to this.