batteries that discharge at different rates

[theunforgiven1]

i have a pair of 18650 batteries that discharge at different rates while vaping. is this safe or do i need to dispose of them?

 

[Topwater Elvis]

You don't give enough info to provide much of an answer.

Which 18650 batteries are you using?
Are they authentic cells? Bought from a known reputable vendor/dealer.
Are the cells identical? ~ same brand, mah, cdr, age, cycles...
What are you using to gauge the different discharge rate? ~ display screen on power device, external/stand alone battery charger, multimeter.

It isn't uncommon for multi cell power devices to charge or discharge cells unevenly noted by battery level indicator on display. Charge cells using a quality external charger and rotate battery positions in the power device / mod battery sled/slots.

 

[DaveP]

theunforgiven1, cell age and differences in internal resistance ( a product of cell age) can cause unequal discharge. Buy your cells in pairs of identical brand and type and keep them married as pairs (and sets of 3 for triple cell mods). They will discharge similarly if kept together and used in married sets. Once you separate them for use as singles in other mods they will begin to develop different discharge characteristics and are no longer matched.

 

[theunforgiven1]

The batteries are Samsung 20s. They are fairly new and there is no damage to them. I bought 2 pairs from 18650 batteries.com. the other pair I use discharge at the same exact rate. I'm using a vaporesso luxe s with a valyrian 2 tank.

 

[stols001]

Is it a large difference or a relatively small one? I bought a bunch of LGs and one just didn't want to charge up all the way. After a while it did but I wound up discarding it, It was making me feel... Ickky somehow. However I do believe batteries don't discharge at identical rates, but if it is enough for you to notice, perhaps it is not so good, IDK.

Anna

 

[theunforgiven1]

theunforgiven1, cell age and differences in internal resistance ( a product of cell age) can cause unequal discharge. Buy your cells in pairs of identical brand and type and keep them married as pairs (and sets of 3 for triple cell mods). They will discharge similarly if kept together and used in married sets. Once you separate them for use as singles in other mods they will begin to develop different discharge characteristics and are no longer matched.

thats exactly what i have done. these 2 batteries are "married". the visual difference is when i use the mod which i believe shows 1/8 increments and there is 1/8 of a visual difference. the other two paired batts discharge at the same rate. another confusing thing i see is using the nitecore ums4 batt charger they charge identically.

 

[Coyote628]

I have a pair of batteries doing that but they are not new. And I think I might be the mod and not the batteries anyway, its not new either. Holy crap, I need a new mod soon.