Ajax DoorProtect: original replacement battery
The right battery for your DoorProtect (opening). The same CR123A type that Ajax pre-installs, so you keep the stated battery life and reliability.
Fit it again in a few minutes: open the battery cover, remove the old cell, insert the new one, close the cover. The Hub and the Ajax app themselves report well in advance that the battery is almost empty.
Technical specifications
| Battery | |
| Type | CR123A |
| Quantity | 1 piece |
| For device | Ajax DoorProtect |
| Service life (manufacturer's specification) | up to 7 years |
| Pre-installed type | Yes, original Ajax type |
How to replace the battery
Step by step according to the Ajax manual:
- Remove the detector from the SmartBracket mounting plate.
- Switch off the DoorProtect.
- Release the clip and remove the front panel of the detector.
- Replace the battery with a new CR123A and observe the polarity.
- Put the back panel back in place.
- Switch the device on and check the battery status in the Ajax app. The status does not update immediately, but after the next ping (every 36 seconds by default).
Would you like the manufacturer’s original instructions with photos? View the Ajax manual.
Frequently asked questions
Is this the same battery as the pre-installed one?
Yes. Ajax supplies the Ajax DoorProtect with a CR123A pre-installed. With the same type you keep the battery life stated by the manufacturer (up to 7 years).
When should I replace them?
Your Ajax app and Hub give a low battery notification in good time. Then replace the cell with this exact type. The manufacturer's stated lifespan is up to 7 years, depending on use and settings.
How many are in this pack?
1 CR123A battery, exactly enough for one DoorProtect.
Isabelle L. (verified owner) –
They last a long time.