Stay away - brings nothing but trouble.

Bought the item at HandyNow. First Product was already defective on (indicator light was burning, but no charge current is generated. After two emails and a phone call then replacement was delivered. Short test with a vehicle light indeed showed moderate performance, it should indeed serve only as a charging station . recharging batteries.
One would think that 500 mA to charge are really sufficient.
So switched off Navi connected to charging a battery pack. Looking after 4 hours on the location device brought disillusionment - defective. Neither the pilot light went was charging current to be measured.
This device is not worth a penny. Dear spend a little more and what vernüftiges.