Pyronix Delta Bell - Hard wired / battery?

[MattT]

Hi All,

I’ve recently moved into a house with an existing Pyronix Enforcer system.

The previous service invoice mentioned that both the bell box and the control panel were due for replacement batteries in 2025. Since it’s a modern system (installed June 22), but with a level 2 internal upgrade, I assumed this meant the square orange batteries would be needed.

When I went to replace the battery over the weekend, I found what’s shown in the attached photo.

It appears to be hard‑wired, but it’s using the cylindrical-style battery instead - BATT-CR34615D . Given that it’s also hard‑wired, what’s the typical replacement interval for this type of battery?

As I didn’t have the correct battery with me, I didn’t take it apart any further. What’s the correct way to access and replace that battery?

Regards
Matt

 

[secureiam]

Hmm, the cylindrical battery you refer to is for the Mk1 wireless bell not a hard wired bell

Mk2 uses2 square
Mk3 uses 4 x cr123A batteries.

The hard wired bells use
Nickel metal hydride battery not lithium

Pretty much wireless uses a lithium battery set, hardwired Nickel batteries main stream manufacturers, the batteries used do vary between manufactures however.



The green battery for this device can be seen to the left of the securing cover screw.

So a tad confused as how the battery you refer to was legitimately connected to the bell in your image and if it was connected if it may have damaged the bell.

At the point that green battery fails it’s prudent to replace the entire unit. Seen those last a very long time.

 

[MattT]

Hmm, the cylindrical battery you refer to is for the Mk1 wireless bell not a hard wired bell

Mk2 uses2 square
Mk3 uses 4 x cr123A batteries.

The hard wired bells use
Nickel metal hydride battery not lithium

Pretty much wireless uses a lithium battery set, hardwired Nickel batteries main stream manufacturers, the batteries used do vary between manufactures however.



The green battery for this device can be seen to the left of the securing cover screw.

So a tad confused as how the battery you refer to was legitimately connected to the bell in your image and if it was connected if it may have damaged the bell.

At the point that green battery fails it’s prudent to replace the entire unit. Seen those last a very long time.

Ah perfect thank you.

I think I have just confused something else on that board with what I thought the battery. I suspect I actually disconnected the siren and I thought that cable led to the battery but couldn't see as it's obscured by that mottled clear plastic over the top.

It sounds like I just leave it alone until I get the error light, thank you

 

[sparkymarka]

It’s a hardwired delta plus , it won’t need batteries

 

[MattT]

It’s a hardwired delta plus , it won’t need batteries

Thank you