Strange resistance reading on batteries...

[icemanistheking]

When using a mech mod, you are supposed to measure resistance on the battery to check for shorts, correct? On most of my batteries, the multimeter just doesn't change, but on three others the display goes blank (nothing on screen) and comes back on - which batteries this occurs on is the same everytime, so I don't think it's a multimeter quirk. Should I be concerned?

It is a very cheap multimeter, though. I need to get a better one, but this one has been accurate in all readings so far, double checked by checking atty resistances on my SVD and by batteries on my Efest charger.

 

[djsvapour]

Check the battery or the atomizer?

I only check my battery if I suspect it's running low. I get a stable reading with the two prongs quite quickly.

 

[icemanistheking]

Check the battery or the atomizer?

I only check my battery if I suspect it's running low. I get a stable reading with the two prongs quite quickly.

Me too, as far as voltage, but I read something once (I believe in a topic on the forums, but could be mistaken) that said one way to detect shorts in batteries is to measure resistance - if there is any resistance on the battery itself, it indicates a short?

 

[djsvapour]

Me too, as far as voltage, but I read something once (I believe in a topic on the forums, but could be mistaken) that said one way to detect shorts in batteries is to measure resistance - if there is any resistance on the battery itself, it indicates a short?

I don't know. I hold my hands up.

However, I see what you are saying. Set the meter to "continuity" and try both ends of the battery, it should show a reading. Clever.

 

[Sthur]

I measure my coils now on a ohm checker box and my batteries with fluke on volts. Like above only check my batteries to see how low they are. No need to check resistance on batteries IMO.

 

[BillyHill]

I believe you can measure voltage of the battery and voltage drop of the atomizer, but if you try to measure resistance of a live circuit you usually get toast.

 

[icemanistheking]

Thanks guys, it's a slight possibility I never read anything of the sort and am just imagining I did

 

[Pod99966]

Any sort of resistance meter has it's own power source. The way it measures the resistance of a wire/coil is to send an electrical charge from one end to the other and by calibrating the voltage drop, it will show you the resistance. A good solid piece of straight wire should (ultimately) have zero resistance.

But taking a resistance check on a battery is a bad idea. You now have 2 conflicting voltage sources. And a battery uses chemical reaction to create/hold an electrical charge so there should be no current path from the positive to the negative, or you battery would get hot and stay hot until dead.

However, measuring from the positive terminal to the negative terminal of your mod is a good way to check for shorts... with no battery installed.

Hope that helps. Electrical Engineer 20+ years.

 

[icemanistheking]

Thanks pod!