When the battery on my Tom Tom Go died I fleetingly considered just buying a new one but I found a video on the internet of one being repaired, and thought it was worth a try. This battery plus a small toolkit to open up the Tom Tom was extremely promptly delivered (free shipping as I recall), and the battery was very easily swapped out over an hour's unhurried work. I played the video in front of me, pausing where necessary. As long as you're happy taking things apart and putting them back together, I wouldn't worry about this job. First class service, and so far (a month on) the battery performance is perfect