I am looking for a bluetooth speaker that can:

* charge through USB, so I don't have to worry about not losing a proprietary charger
* connect through a 3.5 mm line in (aux input) - so I can use it as a regular speaker with any device

The budget is 150 Euro maximum

Yet an important question is: if the speaker has the USB charging feature, then it can charge with any USB charger or maybe some of such speakers can only charge when using their own USB charger?