What to Do If You Forget the Safe Code or the Battery Dies: Emergency Opening Methods

Forgot the safe code or the battery died? Spare key, external battery and digital emergency key methods, with an emergency opening table for Mühlen models.

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Steel SafesAuthor: Mühlen Expert Team17 October 2026

What to Do If You Forget the Safe Code or the Battery Dies: Emergency Opening Methods

Short answer: On electronic keypad safes, there are three ways to open the safe when the code is forgotten or the battery is dead: the spare (emergency) key, supplying power from outside with an external battery / mini USB, and the digital emergency key. Which one is available depends on the model; below we match each method with the models stated on the Mühlen product pages. The only safe way to open a safe without forcing it is to have one of these methods ready in advance.

Three Emergency Opening Methods

1. Spare / emergency key. Most keypad safes can be opened with a key as well as the code. On the product pages this appears as "2 spare keys" or "emergency key". Whether the code is forgotten or the battery is dead, the safe opens with this key.

2. Supplying power from outside. When the battery is completely dead, the panel does not work. On some models, power can be supplied to the panel from outside: on the Oben KS222, the safe is opened by powering the panel through a mini USB cable, and then the battery is replaced; on the Schutz 45P, 50P, 60P, 80P and 100P, external battery connection support is stated.

3. Digital emergency key. On the Panzer SM34, when the code is forgotten, the safe is opened by touching the digital emergency key to the panel area.

Emergency Opening and Battery Information by Model

Model	If the code is forgotten / the battery is dead	Battery information
Schutz 17B, 17W	Opened manually with the 2 spare keys supplied	4 AA batteries; LED warning light
Schutz H-43 TA	Opened with the emergency key; the codes are reset to factory settings with the button inside the safe	Low-battery warning by LED light
Oben KS222	If the guest and master codes are forgotten, it is opened with the key and the codes are set again; if the battery is dead, the panel is powered through mini USB	Low-battery warning on the LCD screen
Panzer SM34	The digital emergency key is touched to the panel	Battery level on the touch panel
MP 53K	Emergency opening key	Easy-to-replace battery compartment with a "push" system on the right side panel
MP 53B, MP 53W	Can be opened with a key in an emergency	Removable battery slot
Schutz 60-T, 80-T	Opened with the main key and the emergency key	The LCD screen shows the battery status
Key Box 60	2 spare keys open the lock inside the battery compartment	6-digit, changeable code
Fire Bag YG2030	Opened with the digital code or the key	The changeable code stays in memory even when the battery is dead

The information in this table is taken from the relevant product pages. For a model not in the table, the method is given on the product page or in the user manual; if it is not stated, do not make assumptions.

What to Do Before the Battery Runs Out

Take the warning seriously. On models such as the Schutz H-43 TA, Oben KS222, 60-T and Panzer SM34, a low battery is shown on the LCD screen or by an LED light. Replace the batteries at the first warning.
Keep spare batteries ready. The product pages of the Schutz 17B, 17W and H43-HQ state 4 AA batteries.
Find out where the battery slot is. It is on the right side panel on the MP 53K, in the battery compartment on the Key Box 60, and in a removable slot on the MP 53B/53W.

If You Forget the Code: Step by Step

Do not force the safe; repeated wrong entries on the keypad trigger an alarm or a panel lock (1–5 minutes) on most models.
Find the spare or emergency key and open the lock with the key.
With the safe open, apply the model's code reset method (e.g. the button inside the safe on the H-43 TA; setting the codes again on the Oben KS222).
Write down the new code in a safe place away from the safe.

4 Habits So You Don't Forget

Do not put the spare key inside the safe; keep it away from home or in another secure place.
Do not make the code depend on a single person; on models with a user + administrator code, keep a record of the administrator code within the company.
Tie battery replacement to the calendar (for example, once a year).
When buying, be sure to ask about the backup access method described in the lock systems comparison.

Frequently Asked Questions

What should I do if I forget the safe code?
Depending on the model, the spare/emergency key or the digital emergency key is used. On the Schutz H-43 TA you can open the safe with the emergency key and reset the codes to factory settings with the button inside the safe; on the Oben KS222 you open it with the key and set the codes again.

Does the safe stay locked if the battery runs out?
No. Models with a spare key are opened with the key; power can be supplied to the panel from outside with a mini USB cable on the Oben KS222, and with an external battery connection on the Schutz 45P/50P/60P/80P/100P.

Is the code erased when the battery is replaced?
The Fire Bag YG2030 product page states that the changeable code stays in memory even when the battery is dead. For other models, if there is no separate information on the product page, check the user manual.

What batteries do the safes use?
The product pages of the Schutz 17B, 17W, H43-HQ, Gun Safe 15D, 17F, 1320F and 1450F state 4 batteries. The MP 53 series has a removable battery slot; check the manual for the battery type.

Where should the spare key be kept?
Not inside the safe; keep it at home or at the workplace, separate from the safe, in a secure place that you know. A key left inside the safe is useless once the safe is closed.