Monthly Archives: March 2015

The Best Batteries for Electronic Safe Locks

We get this phone call every day:  “My safe has an electronic lock and I have changed the batteries but it still won’t open.”  Usually the problem is that they put in cheap batteries.  Yes, there is a difference.


Whether the lock is on a fire safe, commercial safe, gun safe or vault door, the ONLY batteries that will consistently work electronic safe locks are Duracell and Energizer alkaline.  Store brand batteries and even the other famous brands are inferior.  The voltage will be the same on most of them, but the amps will be higher on Duracell and Energizer. Electronic safe locks need high amps to work properly. Use batteries that are fresh from the store, not the ones that have been sitting in that kitchen drawer for six years.  Don’t use rechargeable batteries, either.

One more word of advice:  Be really careful when changing batteries on electronic safe locks so you don’t break the contacts or connecting wires.  That will require the help (and the fee) of a safe technician.

Insulation in Chinese Made Gun Safes

Part of what you typically get with cheap gun safes / Chinese made gun safes is insulation made up from construction scraps.  The pictures below show a new Chinese made safe in our shop for service.  Notice that the drywall is pieced together from different kinds of drywall.  The light and dark pieces are even different thicknesses.  They are glued into place and the seams are mostly covered with tar-like glue.  Some of the gaps are quite wide, which naturally allows heat to pass in a fire.

Dry Wall in Chinese safes 002 Dry Wall in Chinese safes 005

In the light colored pieces at the lower left you can see hammer marks from when these pieces were broken out from whatever they were previously nailed to.  Look close and you can see boot prints.  In a number of places the paper backing is loose – it pulls away from the gypsum when the pieces are broken apart carelessly.  Frequently with this type of junk safe the drywall pieces will be smaller than what is in this safe, as small as 5” X 5”.

Remember a few years ago that many homes, especially in the southeast U.S., were left un-inhabitable by Chinese drywall with very high levels of formaldehyde?  Well, that same drywall was (still is ?) used in Chinese gun safes.  I have read that those formaldehyde emissions promote rust (guns), as well as lung cancer, heart disease, etc.  Do you suppose they still use that crap in gun safes?  What do you think happened with all that high-formaldehyde drywall?  Where in the world could you possibly re-use that stuff?  Think about it.

Do yourself a favor:  Buy an American made gun safe.