Took my ATP out for a two hr. stroll submersed at about 2' depth. Only found $1.42 in change. Got several hard silver signals that rang higher than quarters hitting 86-90 VDI but couldn't get them to turn loose from the hardpan. This lake has about 1 1/2 of sand and then a gravel,rock,clay hardpan. Anyway I gave up the water after my ATP started falsing real bad. I got out of the water,turned off my detector,dryed it off and waited about 15 min. turned it back on still chattering,throwing up high 30's vdis. I noticed that my battery indicator was flashing. I thought Aha! need to change batteries,which I did no help,aborted my mission. By this time I'm a little perturbed thinking it leaked again. I just got it back from Garrett for a leaking problem. I must say the batteries they put in it were copper topped and lasted for approx. 24 hrs. of use before showing any sign of draining. I got home cleaned everything up and pulled the batteries out. I noticed that both ends of the battery holder had an apparent bow on the end. I noticed when I changed batteries at the lake that the holder appered to be really weak feeling unlike the battery holder that I had before sending it in for repair. Further investigation reveals a hairline crack on both ends of the battery pack. At first they appeared as a manufacturs grain in the plastic but after looking at them under a loop they are definite cracks in the material. I also noticed prior to taking the batteries pack out that the control box lid seemed to be protruding a fraction or so,enough to see light between the cover and the control box. I think the bowed ends of the battery holder actually pushed the cover out and was causing the batteries to make a very loose connection. I will be contacting Garrett tomorrow to have them send me a new battery holder. So if your ATP starts going haywire for no known reason check the battery holder very closely for uneven ends and hairline cracks.