I have have my 910 for just over two year . some time ago I notice the battery charge be not last as long as when it be new . Pretty soon it would not hold a charge at all and then would not even operate when plug into a power source . when I call the customer support , they seem to know immediately the battery be shoot . I will have to send it in for a repair . BTW , they will not ship to a apo address even though the unit be purchase from a apo address . I 'll look at Garmin for my next navigator .