Battery Conductance Meter?

[ClassicCrazy]

This battery tester says it does lead acid too - up to 80 AH ?
Specs and instructions are on link
https://www.ebay.com/itm/ZB206-V1-3-Tester-for-18650-Battery-Capacity-And-Internal-Resistance-Red/332483324459?epid=17010302879&hash=item4d698cea2b:g:GTEAAOSwWLBaLlkH

here is another meter  - not sure about this one - they are wearing their heavy leather gloves while testing the 9v battery - ha ha
https://www.ebay.com/itm/Digital-Battery-Internal-Resistance-Meter-Battery-Voltage-Tester-High-Accuracy/252469330660?hash=item3ac85842e4:g:VlcAAOSwzRpaL3X-

and here is another one
https://www.ebay.com/itm/Battery-Capacity-Internal-Resistance-Voltage-Values-Measurement-Meter-Tester/332385477679?hash=item4d63b7e42f:g:eoYAAOSw6HJZwd9M

Larry

[CoraDias]

Hi...i am a new user here. I only know that if their meter said it was below a certain capacity we had to put in new batteries.  I never did understand exactly how those meters determined capacity - maybe did a quick load test and conpensated for temperature ?

pcb assembly request

[ClassicCrazy]

Hi...i am a new user here. I only know that if their meter said it was below a certain capacity we had to put in new batteries.  I never did understand exactly how those meters determined capacity - maybe did a quick load test and conpensated for temperature ?

If you are talking about the small handheld sealed lead acid battery testers -  I think they were temperature compensated and they probably just calculated the batteries interenal resistance and voltage with a quick load test. I never thought they were very accurate because brand new batteries never tested 100% either.  And two different meters would give two different readings on the same batteries.

The good thing about them was I got to get good used batteries that they said had failed.

Larry

[dbcollen]

Brand new batteries are never at 100%. It takes several cycles to finish building the positive plates.

[ClassicCrazy]

Brand new batteries are never at 100%. It takes several cycles to finish building the positive plates.

good point
With that in mind maybe the worst thing for those new batteries was just putting them in a system that floats them and never cycles them.

Larry