High ambient temperatures in Egypt combined with inefficient 5V/1A legacy car chargers cause thermal throttling and battery degradation in modern iPhones.
The solution requires a Power Delivery (PD) 3.0 certified car charger with dynamic voltage scaling (PPS). This allows the charger to negotiate the exact voltage (9V) and current required, shifting the heat generation from the phone's internal power management IC to the car charger itself.
