I bought a Sentry fire safe about 3 or 4 years ago. One day it would not open with my user code or the factory code. I called customer service and explaned that the electronic lock would not accept my code. They kept trying to tell me it was the batteries or the battery pack. I had put a volt meter on the battery pack and the batteries were good and sending the correct voltage. All they would due was send me a new battery pack. After recieving it i put it in and the thing still had the same problem (Which I tried to tell them.) I called back... read full review »