I received my Kruzer on Thursday. The Kruzer came with battery fully charged, I used that evening and the next morning. That morning when I returned home after using the Kruzer for around 3 hours total detecting time, I connected the battery adapter with U.S. adapter plugged in and connected to the charging port on Kruzer. I let it charge for around 3 hours and then unhooked it to see if it was charging (no light or indicator on adapter to see if it is on), still 3 bars no change. I am wondering if I am missing something (nothing in the manual) or the adapter is defective. Any advise would be appreciated