How to measure battery sag

[Mezrein]

Anyone know how to measure a batteries sag? I.e a 2 year old battery next to a 1 year old?


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[zahzoo]

Seems simple... A digital multimeter, two freshly charged batteries... vape on one for an hour and count your hits. Measure voltage. Repeat on the other battery. Continue to alternate until you notice a statistical difference. At some point, the older battery should have less life.

 

[Botomline]

Look for extra skin hanging down??????? I have no idea what this is.....

 

[p7willm]

I am sure the battery companies have some sort of machine in their R&D labs that runs batteries through all sorts of tests. Since it probably cost 10s of thousands of dollars I just chuck a battery out when I feel it is not holding as much of a charge as when it was new.

 

[Relayer1974]

Are you talking about the drop during a vape? If so, you can use a digital multimeter and clip the leads to the atomizer posts with a coil built if you have a dripper or other atty with exposed posts. you should see normal battery voltage without firing, and some kind of drop when firing. Easy day.

 

[Bunnykiller]

to make the test "count" both samples would have to be used in the same manner during the time trials... any variance will result in improper results

 

[Mezrein]

Ya was talking about droppage during vape. The post idea sounds like a good plan. I have a russian and kfl. Thanks for the idea. Next question would be how much of a drop from a fully charged battery would be considered bad?


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[jimbill]

Here you can build a meter very cheap and will test voltage under load.

http://www.e-cigarette-forum.com/fo.../435871-diy-battery-voltage-tank-o-meter.html

 

[jimbill]

You could buy the Sigelei-20W on fasttech for $83.00 and it will read real time battery sag here is a video showing the sag at 17:00.

 

[sonicdsl]

Moved to Batteries and Chargers

 

[Mezrein]

Cool volt meter idea, but how much voltage drop is considered bad?


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[Kemosabe]

1V is bad. 0.25V is good.