Most nüvis come out of the box with some charge in the battery. Your best bet is to turn the device on and use it until the battery is fully discharged, ignoring low-battery messages along the way. When the nüvi finally shuts off, the battery is fully discharged and is safe to recharge. You should give it an uninterrupted initial charge—preferably from a wall outlet—until the battery indicator reads full.
Most nüvis ship with internal, nonreplaceable lithium-ion batteries that you can charge in any of three ways:
• From the accessory outlet in your vehicle
• From a USB port on your computer
• From a wall outlet
Typical nüvi users keep their units charged while the units are mounted in a vehicle. The mount charger ...