My coil stopped working while detecting in about 2 feet of water on Friday. I took my control unit off the shaft this morning to send it and the coil back for service when I noticed a little white sticker on the unit that said "Warranty extended to 9/2013". Whooopee! I had forgotten that when I sent it in for the upgrade in 2011, they tacked on two more years on the warranty. Thank you Garrett!