I bought my first MTG 900 about 5 years ago and couldn't believe how well designed and tough it was. People always commented on how cool it looked and I always recommended it to anyone that asked. After 3 years the battery would not hold a charge. I checked Casio's website and they clearly state that the battery should never need replacing. I then checked into a new battery: $50 if casio does it and no local jewelers would touch it. I was afraid that since Casio says the battery should never require replacement, I could be out $50 for a new battery and still have an inoperative watch. I liked it so much that I decided to buy another one---this time directly from Casio's website. 2 years later the battery died! I wrote Casio customer service twice and got no reply. I haven't heard anyone else complain of this and in fact I know two people that have had the same watch for 7+ years now with no trouble at all. Should I be foolish enough to pay another $100+ ? Third times a charm? Fool me once, shame on  you...fool me twice, shame on me....third time????