Review on ChargerCity 12v Garmin Nuvi GPS Car Charger Adapter - Extended 6FT Cord & Magnetic Ferrite, Guaranteed Replacement (Compatible with Garmin 010-11838-00 / 010-10723-06 / 010-10723-14 / 010-10851-11 / 010-11478-03) by James Edwards

If you are thinking of buying this for your Garmin Montana 610t, DO NOT! This is some sort of counterfeit and not the equivalent of Garmin part #010-10851-11 (suitable charger for Montana devices). In both my car and ATV, this charger gives a "device not supported" or "unrecognized device" error on the Montana GPS receiver and it won't charge. Sometimes you can do it, but 90% of the time it doesn't work. Get a genuine Garmin part number 010-10851-11 instead.