Yes, the Iphone’s battery can certainly explode, just like all other electronically charged devices. The truth is that no matter which device you own, for as long as it has a charged battery inside it, it can explode in unfortunate incidents. However, you can always take precautions so as to avoid this from happening. The biggest precaution that you can take to keep your Iphone’s battery safe is to use the dedicated charger.
Using third party chargers is the prime reason for major battery damage. While it is certainly possible, there are very remote chances that this would ever happen.