Hello george48, and indeed welcome to the forum.
Which year and which model i-MiEV do you have, how long have you owned it, how many miles on it, and what typical fully-charged RR (Range Remaining) do you see?
We have a very active, technically knowledgeable, and very respectful worldwide group on this forum that is happy to answer just about any question anyone may have about the i-MiEV, so feel free to ask. We already have a large quantity of topics discussed over the last eleven years but the search engine on this forum leaves something to be desired. Sometimes we get lucky and it does respond to key words for issues we've seen in the past.
