Question about Philips Shaver Series 1000

This model definitely has a rechargeable battery, not batteries. Charging takes place via the supplied charging cable with USB plug. No mains adapter is supplied. However, you can use any mobile phone power supply with 5V and USB socket. Incidentally, it is a poor shaver with a weak motor that runs too slowly, presumably to avoid overloading the undersized battery. Shaving performance is moderate, even if it says Philips on it. However, this assessment only relates to the model specified.