QQ: I have a married set of LG 20a 3000 mah batteries. They are brand new and have only been used in one mod. (smok Alien). The batteries charge to 100% but the "A" battery begins to loose charge (with use) slightly faster then the "B". Why would this happen? I did a test to switch the battery locations and immediately and it produced the same result: "A" showing slightly less charge then "B". No imbalanced warnings. Mod is working fine just wondering if this is "normal" or if I should be concerned.
"A" battery discharges faster than "B" battery
- Thread starter Buckeyevapen
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It sounds to me like something slightly off with mod if it was battery it would move with battery not location. Jmo
Thank you for the reply.
Slightly off like get it replaced or slightly off like probably not a big deal?
It seemed that's what was being said..that the battery locations were switched and the same battery still discharged to a lower voltage.
@Buckeyevapen, if this is the case it's completely normal as every battery is slightly different from the other. It's not a problem unless the difference is large or is quickly becoming large.
Thank you Mooch.
is 5-6% difference "big" or "normal"? (This difference has been consistent) Thanks again.
Actually the battery locations were switched aand the same location on the mod showed the difference in charge level not the battery. Sorry I miss read your statement above.
This is what I am hoping is going on. I just want to make sure that it isn't a faulty mod while it's still under warranty.
Also, I wouldn't rely on the mods battery meter to be very accurate, use a digital volt meter to be sure.
Ahh, ok, I misunderstood.
As @AzPlumber mentioned the battery meters in our mods are often not very accurate.
Both batteries in a series connection though, by definition, are discharged at the exact same rate. But since each battery has a slightly different capacity, internal resistance, etc., it results in the battery voltages differing as they discharge. Combine this with the inaccuracy of some mod voltage readings and a 5%-6% difference is not uneard of.
If the voltage difference starts increasng a lot then one of the batteries has probably reached the end of its life.
As @AzPlumber mentioned the battery meters in our mods are often not very accurate.
Both batteries in a series connection though, by definition, are discharged at the exact same rate. But since each battery has a slightly different capacity, internal resistance, etc., it results in the battery voltages differing as they discharge. Combine this with the inaccuracy of some mod voltage readings and a 5%-6% difference is not uneard of.
If the voltage difference starts increasng a lot then one of the batteries has probably reached the end of its life.
So long story short: it is a nominal variance that should only be a concern and addressed should the difference in voltage increase.
Thank you mooch and everyone else for the help.
I sometimes see a .1v (one tenth volt) difference when I take a married set out of a mod. I also see this in my RX200S when I do the on-board voltage check when they are installed in the RX200S. It's not an issue with a small difference in voltage, IMO. As AZPlumber said, make sure connections are clean and read them with a voltmeter outside the mod just for comparison.
I also use a Smok Alien but with Samsung 30Qs.
I have exactly the same issue. Battery A is always about 5% lower in capacity than battery B, both batteries only about a week old.
From the sounds of it, could just be a discrepancy with the mod assessing the battery charge.
I have exactly the same issue. Battery A is always about 5% lower in capacity than battery B, both batteries only about a week old.
From the sounds of it, could just be a discrepancy with the mod assessing the battery charge.
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