eForCity Vehicle Car Charger Compatible with Garmin n¨¹vi 1300 4.3-Inch Portable GPS

• Vehicle Lighter Adapter (12~24v DC).
• Smart IC chip recognizes a fully charged battery and automatically switches to a saver mode.
• GPS can be used during charging.Short circuit protection. NOTE:When using this charger for GPS device, GPS device might restart with computer mode; after less than 10 seconds of synchronization, GPS will start with GPS mode with charging from the charger.
• LED charging indication.
• Plug never heats or overcharges the battery.

It's a good deal for the money, it doesn't stay in 12 volt socket to securely, but works good enough.

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This charger works when the gps. Is not switched on. Whenever I switch it in with this charger plugged in, gps does not even work.

I would suggest not to buy this product.