Battery for HKC SABB External Sounder

On 22/04/2025 at 10:44, Eugene's DIY Den said:

There are two problems I think. When the panel is powered down and the battery disconnected, the sounder is barely audible, suggesting the battery is at fault. With everything powered up, the  sounder volume randomly increases and decreases and has a "scratchy" sound, like when the volume control on a radio is bad. So like you suggested previously, possibly the piezo element at fault too. I'm going to open it up today.

cqr used to have clear plastic & you could see them inside

I use to find them inside cables upto 1m or so, I reckon they crawled in, & each time one crawled in behind the they;d move up more ?

29 minutes ago, Eugene's DIY Den said:

Battery not at fault, it was the piezo element. However HKC say the battery should be good for 5 years, and now it's 8 years. However I tested it, and it can still power the sounder for the 15 mins set by the jumper.

battery in sounder will last 2yrs or 20 yrs....