Multifunctional travel charger

A multifunctional travel charger, based on a mains adapter having a mains plug and an exchange type power conversion unit, the mains adapter being adapted to transform and rectify the power obtained via the mains plug for providing the electronic products with required DC power via a DC power output terminal,

• wherein a battery compartment is formed in the mains adapter for insertion of separable primary/secondary batteries to establish a closed circuit;
• and
• wherein the mains adapter includes:
• a) a charging control circuit electrically coupled between the exchange type power conversion unit and the DC power output terminal, the battery compartment being electrically coupled to the charging control circuit for obtaining power to charge the secondary battery within the battery compartment;
• and
• b) a DC booster control circuit electrically coupled between the battery compartment and the DC power output terminal for boosting the DC voltage obtained from the primary/secondary batteries so as to provide the electronic products with required voltage via the DC power output terminal.