While putting force to plug usb cable to the port I broke the GND pin of the microUSB port. The port is probably soldered to the device's PCB, and the device itself is not disassemble friendly (Sphero R2D2 toy).
What are my options to charge the device? Can I modify a USB cable to support charging this particular port for example?
Right most tooth broken from the tongue
I think I broke pin 5:
61 Answer
The USB port looks to be in bad shape, so I would counsel the replacement of the whole thing.
I suggest asking for advice from Sphero Support about how to open the case. If they don't answer, maybe a computer repairman can help with this unusual case, to open the case without breaking it.
