If the phone’s USB data lines (D+/D-) are shorted to ground or to VBUS, the loader forces the EDL handshake at full voltage (3.3V–5V) without proper impedance. This creates a near-short during the initial handshake, rapidly heating the PMIC’s USB transceiver.
The loader itself is not dangerous under normal conditions. You can safely use it if: qualcomm flash loader v10 hot
In EDL mode, the device may try to draw power solely from USB (bypassing battery management). If the battery’s protection circuit is faulty or if the phone has a dead battery, the PMIC attempts to boost 5V USB to 3.7–4.4V for the CPU — an inefficient process that generates intense heat. If the phone’s USB data lines (D+/D-) are