Question: What is indicated by <chg_status> value of 2 in the +CBCHG AT command set for User Equipment (UE), as per 3GPP specifications?
Option 1: No charger connected to the UE
Option 2: Charger connected, specifically a USB type charger
Option 3: Low battery warning triggered by the charger
Option 4: Normal type charger disconnected from the UE
Explanation: In the context of battery charger status reporting via the +CBCHG AT command, <chg_status> is a parameter that indicates the type of battery charger status. A value of 2 specifically signifies that a charger is connected to the User Equipment (UE), and more precisely, it is a USB type charger. This distinction is crucial for managing power supply and charging operations in UE devices, highlighting the importance of accurate charger type identification for efficient device management.