Just got my UDM last week. a fantastic car i must say.The owner actually given me all the keys and there are 2 keys with remote. one Key A) key is being used regularly and the other one (key B)being used one in a while, according to the previous owner.I can'y use the key B to open and close door, and appear that need to be charged. I read the manual that you need to drive a distance to be charged and I travelled by using the key for about 1 hour drive.The problem is it is not yet charged and my question is, am i doing it correctly or just need more time to charge?