I'm guessing there are still a lot of people with Edge 1000s out there. Any experience of using theirs with a replacement battery would be useful. My unit, with its original battery still in, is only lasting about 30 mins now, so its well past it now. Replacement battery required. Any current advice would be appreciated. I've read all the threads on the Cellonic, Newpower99 etc, but they are all 3years old.