surely the other issue is what do the units need power wise to function as that may well vary from equipment manufacturer.

 

then given that the performance of the batteries varies significant based on the power they are drawing, so how much power does the wirless units draw, then you could get a better idea of which battery to opt for, but lower draws would suggest duracell or panasonic.

 

the right battery would be based on how it handles the demand from the device it is in, duracell seems consistantly good on all these test curves?

Edited September 28, 201510 yr by secureiam

duracell and panasonic seems to do well

a volt check means nowt, you never did that on the sla as a good test. Depends on the gear experience will out.

 

Sorry but can you expand about the service level agreement? Why wouldn't a volt test give a good indication?

 

Other than testing amps what else can you possibly do? 

sla was sealed lead acid. Any cell wil only give a decent reading under some load.

Who says you dont learn new stuff every day!

 

So your saying volt testing lead acid batteries doesn't give a good indication, but lithium would?

 

How would you best test a PIR battery then? 

There isn't an ideal way.

Loading a battery and Volt testing will show accurately but doing that on a primary cell will affect it's life so all you can really do I Volt test. But I don't know that much about batteries in the level required

 

How would you best test a PIR battery then? 

 

We dont, for the reasons above, we replace lithiums acording to our procedures and without testing

Pretty much the only way, I notice the once-available ACT Lithium Tester is long discontinued...

I have found batteries of all types, descriptions and manufacturers to be like lamps they can last a long time or a short time and with wireless stuff when monitored gives an advanced warning. Even then when the sun comes out what appeared to be a failing battery has been recovered by the system until the next cold spell. What we tend to do is use the ones we find to be best as the above chart indicates and of course the use and therefore drainage of the battery will dictate to a great degree how long they will last. E.g. on the wireless sounders from Texecom I saw the note about the life of the batteries can be between 2 years or 4 or 5 years depending if you enable the "comfort" led's or not. If you do continuous bell testing this too will reduce the life of them.

 

My biggest gripe about radio/wireless stuff is battery life. I see it as the weakest link in the security of the system even if the system proves to be great when working properly.

Yep, I had the old 'recovering battery' problem on one where service had been refused the previous year, and in failing it gave several 'low battery' reports.

 

My theory is that the frame was quite thin, and right in the sun on the reverse, so it kept heating up on warm days and the voltage went high then low again.