Battery Charging, Nuvi 35
Charge the unit over night, Plug in the AC charger and you should see a lightning bolt over the battery bar graph display.
With the charger plugged in, gently press and hold the on/off power until the screen goes black and displays the text "Charging battery". After a few seconds, the screen will go black to conserve power. At any time, you can press the screen and it will light up saying its still charging.
If you let it go over night, when you touch the screen, it will say Charging Complete and you can then remove the charger. You should have full green bars on the battery indicator.