I have been using a 12.9” iPad Pro from the start and one of the things I was not so happy with the 2017 model was battery life. On more than one occasion it did not last the day. But I can’t get over how good the battery life is for the 2018 model. My experience to date is the battery lasting between 12 and 15 hours with a mixture of use. It was worth upgrading just for that!