Another side of the coin- Winchester Safes
Some of you will remember this story, but here goes again.
The keypad on my Winchester safe was eating batteries weekly. After being told a couple times by @BobJudy I called Winchester safe to learn they had a run of bad keypads and have since fixed and upgraded the problem. They gave me contact info of their vendor, L P Locks out of Ca.
Spoke with a rep there and a new keypad was shipped to me no charge. When the package arrived it contained a personal cell phone number to the rep herself with a note to call her for a walk through of change out.
It's the weekend but I called and a very nice helpful lady walked me through the change out of the keypad to the new upgraded one. I learned from her the combination is retained within the lock mechanism and not the keypad. Got the new pad in with new battery and has worked flawlessly for 4 years now, WITH same battery. I did go ahead and change combo at that time though.
Both Winchester and LP Locks were very helpful in my situation.