Every 510 pass
through I've bought (5 total, including 1 from TotallyWicked) quit within 1 to 3 months and never worked again. I changed the battery, I tried the type that comes without a battery, and in addition to the 5 PT's for the 510 models I've had over the last nearly 2 years (July 7, 2011, is my 2-year anniversary off analogs!), I'm having problems with the Janty USB pass-through unit. It won't hold a charge for some reason.
You've got company when it comes to bad 510 pass-through units as well as, or so it seems, Ego USB pass-through units too.
I bought a 510 passthrough from tw last year..it lasted for nearly a year. It died, I bought 2 more thinking I would be "covered" for at least a year...both konked out in about 2 weeks. Any ideas?