I sent in a LX3-tc and they fixed it promptly with no charge. Had the LX5 display start jumping around about 6 months out of warranty. Known problem, I paid postage and the fee to fix it. Just now had a Brute battery that I acquired two years ago and for various reasons never used it until a few months ago. It was bad, Marcum replaced it in record time. Overall, I'm happy with Marcum's service. Also have their Troller 2.0 unit. Might sound like a lot of warranty work/trouble, but I use my equipment and sometimes it gets banged around. And the above was over a period of 15+ years as well.