I want to swap out my four year old battery before taking it on a trip this summer after our lockdown. I had a battery failure on a previous trip in a remote area that was about five years old and I do not want a repeat. I do not have a scanner but have been wanting to get one for my vehicles. I also want to plug a memory saver into the diagnostic port to retain memory while the battery is disconnected. Is anybody here using a scanner that can also supply juice to the ECM?