Whch charger for hipstreet pilot.(quite old)

Hi,

Here’s a link to a supplier of the charger.

It shows that the charger has a 5V DC / 2A output with the plug size of 2.5mm. (this is the inner diameter measurement, the outer diameter is 5.5mm)

Check electronics stores in your location for plugpack adapters having the same specifications. The voltage/current output specifications should be printed on the adapter. You may have to verify the plug size as there is a similar looking plug with a size of 2.1mm that is often confused with it (2.1mm inner diameter and 5.5mm outer diameter)