Sphero approved USB hubs have 700mA+ per robot, are high quality and known to prevent over-voltage spikes. If you are not sure your USB hub meets our specs please use this 6 port hub available on Amazon.com.
For our Australian customers, we suggest this multi-port charging station.
If your SPRK+ has been fully charged but flashes red and turns off quickly after connecting, follow this link.
If you have any questions or concerns, please follow the link to open a new support ticket.
Or feel free to contact us at your convenience: