It looks like it says 5 Volts at 2 Amps which is more than enough, however I would try the battery screen because it may still say I-Limit - 500mA (you need I-Limit 1300mA), if it does say 500mA, its is because your Nuvi is looking at the ID pin on the Nuvi USB socket, some models need a modified cable to tell the Nuvi to use higher power, my Nuvi 56 can use a normal USB cable but other models need this. The Battery Menu shows USB ID 3.30 USB Type-B, you may find that when the Nuvi is charged from the car charger that the display is different, with a different USB ID number and maybe USB Type = Power Cable, also I-Limit will be 1300mA