Pam, >In the case of the unit stopping and the issue of batteries, it is a known issue with the battery contacts. The contacts in my Book Port appear to be fine - they are not bent flat in any respect. The batteries fit very snugly - and they were firmly in place but the unit still wouldn't work, which makes me suspect that something more is at issue. I've had electronic gizmos all my life, and have had my share of problems with battery contacts, but this looks like a different kind of problem. If it is the battery contacts, do you recommend the use of contact fluids or anything else to improve conductivity? I.e., something along the lines of a do-it-yourself repair? Peter