Replacing the batteries in a SimonsVoss locking cylinder is a job most people can do themselves in a few minutes, using the correct installation key and two CR2450 batteries. This guide covers the two most common cylinders in the SimonsVoss digital locking systems range, the Digital Cylinder AX and the Z4 locking cylinder, and walks through the replacement process for each.
► Replacing the Batteries in a Digital Cylinder AX
What you’ll need:
- SimonsVoss Z5.TOOL installation key
- Two CR2450 batteries
The Digital Cylinder AX is built for reliability and straightforward maintenance. To replace its batteries, open the cylinder with the installation key, remove the old batteries, insert the new CR2450 batteries, then close the cylinder using the same key. Battery life varies with how often the cylinder is used; a door opened dozens of times a day will need new batteries sooner than one used only occasionally.
In short: the Digital Cylinder AX takes two CR2450 batteries, opened and closed with a Z5.TOOL installation key, and the swap takes a matter of minutes.
Video tutorial: How to replace the battery in the Digital Cylinder AX
► Replacing the Batteries in a Z4 Locking Cylinder
What you’ll need:
- SimonsVoss Z4.SCHLUESSEL battery replacement key
- Two CR2450 batteries
Replacing the batteries in a Z4 locking cylinder follows the same logic as any SimonsVoss electronic lock. Open the cylinder using the battery replacement key, remove both old batteries, then insert two new CR2450 batteries with the positive terminals facing each other before closing the cylinder with the key. As with the AX, how hard the cylinder is worked day to day affects how long a set of batteries lasts.
In short: the Z4 cylinder also runs on two CR2450 batteries, opened with the Z4.SCHLUESSEL key, with the new batteries fitted positive terminals facing each other.
Doing It Yourself
Changing the batteries in either cylinder is a straightforward task that most people can carry out with minimal fuss, in the same way you’d replace the battery in a transponder. Follow the instructions for your specific model, and keep the correct key and a spare set of CR2450 batteries on hand so the cylinder stays operational and you’re not caught out mid-installation. If you’d rather not do it yourself, or you manage a larger keyless entry system across multiple sites, get in touch and our team can talk you through options for ongoing maintenance.
FAQ
What batteries does a SimonsVoss locking cylinder use?
Both the Digital Cylinder AX and the Z4 locking cylinder use two CR2450 batteries.
What tool do I need to open a Digital Cylinder AX?
You’ll need the SimonsVoss Z5.TOOL installation key to open and close a Digital Cylinder AX.
What tool do I need to open a Z4 locking cylinder?
The Z4 locking cylinder is opened and closed with the SimonsVoss Z4.SCHLUESSEL battery replacement key.
How long do the batteries last?
Battery life depends on usage. A cylinder that’s opened frequently through the day will need a battery change sooner than one used only a handful of times.
Which way round do the batteries go in a Z4 cylinder?
The two CR2450 batteries should be inserted with their positive terminals facing each other.
Can I replace the batteries myself?
Yes. Both models are designed for straightforward self-service battery replacement, provided you have the correct key and the right batteries on hand.