LG HG2 capacity question

[bombastinator]

So I want to give my sister an aspire NX75-a because as far as I can tell it’s the safest removable battery mod to charge batteries in that there is (could be very wrong about this one)
Anyway I bought a brand new LG HG2 at my local vape shop. Problem was they pulled it off their charger. So I took it home and tested it. 2570ma, 2547mah, and zero ohms internal resistance (still don’t know if it’s AC or DC :/)
The battery is rated at 3000ma so this struck me as odd. Is this right or did they sell me a used battery? Is ~2500ma merely the real rating?

 

[Shadav]

according to mooch
List of Battery Tests | E-Cigarette Forum
LG HG2 20A 3000mAh 18650…a fantastic 20A battery!

LG HG2 w/QR code 20A 3000mAh 18650...slightly under capacity, ran a bit hotter

I seem to recall that they were more towards 2500

 

[Rossum]

Internal resistance cannot be zero. That's impossible.

 

[bombastinator]

Internal resistance cannot be zero. That's impossible.

Hmm.... maybe I did it wrong then. I followed the directions from the video and the meter read zero.

I’ll do it again. The thing is just in the other room... right you are! Apparently the meter displays the numbers quite quickly. Total voltage 4.17, ohm 017 (not sure where the decimal place is on that one) and something else is zero. Not sure what. The thing has undocumented features and part of them is anything to do with the probes.

 

[Rossum]

0.017 Ω or 17 mΩ is reasonable for HG2s. Using a dedicated AC meter, I've seen ones with zero cycles at around 15 mΩ, and just above 20 mΩ for some that have seen a good bit of use.

On what basis were the 2570ma and 2547mah measurements done? Basically, how deeply were the cells discharged?

 

[bombastinator]

0.017 Ω or 17 mΩ is reasonable for HG2s. Using a dedicated AC meter, I've seen ones with zero cycles at around 15 mΩ, and just above 20 mΩ for some that have seen a good bit of use.

On what basis were the 2570ma and 2547mah measurements done? Basically, how deeply were the cells discharged?

I hit the “refresh” button on the charger. That of course is also undocumented. More mystery numbers I guess. I suppose I could watch the video again and maybe get lucky. I’m getting a bit tired of that video. I’ve only got so much brain stamina for technical videos and I’m behind in my mooch watching. I really want to not be behind in my mooch watching.
Ornithology for vapers I guess. (Long billed mooch 6 o’clock in the big elm! Get a photo Ethyl! I think it’s testing!)

 

[Hawise]

I hit the “refresh” button on the charger. That of course is also undocumented. More mystery numbers I guess. I suppose I could watch the video again and maybe get lucky. I’m getting a bit tired of that video. I’ve only got so much brain stamina for technical videos and I’m behind in my mooch watching. I really want to not be behind in my mooch watching.

@bombastinator, do you know how many discharge/charge cycles your charger does when you refresh? I'm wondering because some chargers go through three cycles, which would be a bit of a strain on li-ions. The refresh function is really meant for NiMHs, although if I recall correctly the Xtar Dragon, which I think might be the one you have, only does it once so it can be used occasionally as a capacity checker.

Assuming you have the Dragon, lygte says it goes down to about 2.6 v on refresh. The 3000 mAh capacity would be measured from a lower voltage: 2.4 v, I think. That's pretty close, so even though it wouldn't get up to 3000 mAh, I'd expect something a bit higher than 2570. Age and/or storage conditions could be responsible for a lower reading.

 

[ASCC]

Capacity test new LG HG2 (with matrix-code)

 

[Opinionated]

There is something your not considering.

Batteries discharge even when not in use. In storage you have to periodically check your batteries and make sure they aren't discharging too much.

Batteries from the manufacturers are not shipped with a full charge and just sitting they will begin to discharge slowly therefore, that may be something your vape shop keeps an eye on (which is a good thing since they are selling them)

This may be the reason your vape shop had some batteries on the charger..

I'm just telling you this since your assuming there isn't an innocuous reason..

 

[bombastinator]

@bombastinator, do you know how many discharge/charge cycles your charger does when you refresh? I'm wondering because some chargers go through three cycles, which would be a bit of a strain on li-ions.

1 I believe. It takes a long time though so it might be higher. The documentation is nearly non existent

The refresh function is really meant for NiMHs, although if I recall correctly the Xtar Dragon, which I think might be the one you have, only does it once so it can be used occasionally as a capacity checker.

yep. Xtar dragon vp4 plus. That’s what I was using it to do.

Assuming you have the Dragon, lygte says it goes down to about 2.6 v on refresh. The 3000 mAh capacity would be measured from a lower voltage: 2.4 v, I think. That's pretty close, so even though it wouldn't get up to 3000 mAh, I'd expect something a bit higher than 2570. Age and/or storage conditions could be responsible for a lower reading.

Interesting. So older new stock badly stored. I was hoping to give it to her and say the battery was good until Christmas. Is this a safe assumption?

 

[bombastinator]

There is something your not considering.

Batteries discharge even when not in use. In storage you have to periodically check your batteries and make sure they aren't discharging too much.

Batteries from the manufacturers are not shipped with a full charge and just sitting they will begin to discharge slowly therefore, that may be something your vape shop keeps an eye on (which is a good thing since they are selling them)

This may be the reason your vape shop had some batteries on the charger..

I'm just telling you this since your assuming there isn't an innocuous reason..

i assumes the reason they were doing it was so they had totally full batteries to pop into devices they were selling so folks could walk away vaping. Problem is storing batteries in a charger seems to be frowned on here, and it made the age of the battery unknown. Also possible they were getting reused. If I was really worried I would have stopped them. I did the check because I wanted a start reading on the new battery. I was expecting higher numbers though so I posted.

 

[Opinionated]

i assumes the reason they were doing it was so they had totally full batteries to pop into devices they were selling so folks could walk away vaping. Problem is storing batteries in a charger seems to be frowned on here, and it made the age of the battery unknown. Also possible they were getting reused. If I was really worried I would have stopped them. I did the check because I wanted a start reading on the new battery. I was expecting higher numbers though so I posted.

Well just remember - and as a finicky curmudgeonly member of ECF you should already know.. lol.. - freinds don't let freinds buy vape shop batteries.

Get your batteries from a wholesaler like IMR or LIION.. take the time and spend the extra dollar to make sure of what your buying.

 

[bombastinator]

Well just remember - and as a finicky curmudgeonly member of ECF you should already know.. lol.. - freinds don't let freinds buy vape shop batteries.

Get your batteries from a wholesaler like IMR or LIION.. take the time and spend the extra dollar to make sure of what your buying.

No time. I need em friday. Plus they’re a good shop. They are real batteries. They just apparently sat on that charger for a while apparently. Plus I had a tester at home. I still think their system is good for how they do it.

 

[bombastinator]

Bah. Overnight shipping is going to suuuuck.

IMR won’t sell me less than 6 at a time and I want 1.

RTD doesn’t do 2nd day shipping.

Orbtronic has both but it wouldn’t give me shipping info until I added stuff it didn’t need and it’s paypal option locks my phone

Liion wants $23 in shipping for 2nd day, and they want unnecessary personal info to reveal shipping costs which start at double those of the others so far

Batterybro wont ship less than 50 batteries.

Looks like I was right the first time. No time.

I’m going to go with “it will be fine till Christmas”. or at least next month.

I’m not paying $30 for a battery that very possibly isn’t any better than the one I got.

 

[Punk In Drublic]

Have you compared them visually to other LG HG2? Won’t indicate the health of the cell, but if they are visually different from other HG2’s then you may have received a fake.

I’d also inquire with the store as to where they source their batteries from. IMR does distribute to B&M’s, and will assume so do some of the other vendors on Mooch’s list

Two thumbs up for Mooch’s recommended battery vendors, but sometimes they are just not realistic. 2x LG HG2 from IMR would cost me, a minimum $56 CAN. Not to mention the risk of them getting confiscated at the boarder. I can walk to a local B&M, purchase the same LG batteries that are sourced from the same IMR vendor for a fraction of the price. If Mooch’s vendors are an expensive option, a little due diligence can go a long way – inquire with your B&M where they source their batteries from, and ask if they stand behind their product should you receive a dud or counterfeit cell.

 

[Rossum]

IMR won’t sell me less than 6 at a time and I want 1.

 

[bombastinator]

I got lots of batteries already. I specifically do not want more because the ones I got should last longer than the amount of time it will take for the five new batteries I don’t want to age annoyingly. I specifically bought this particular mod because while it has a removable battery it is fully capable of acting as a sealed battery, complete with a reliable charge port. Which is how my sister wants to use it. She doesn’t WANT a battery charger. At all. As a result I specifically do not want more than one new battery. One(1). The video implies no one orders fewer than half a dozen batteries at once, and that I am just being insanely cheap. In some cases true. Not in this one though. Or many others.

 

[susieqz]

nope, you aren't.
buying less than 8 batteries n shipping eats you up.

on the plus side, i bet all the batteries i get from liion will last years.
i don't trust shops.

 

[bombastinator]

Have you compared them visually to other LG HG2? Won’t indicate the health of the cell, but if they are visually different from other HG2’s then you may have received a fake.

I’d also inquire with the store as to where they source their batteries from. IMR does distribute to B&M’s, and will assume so do some of the other vendors on Mooch’s list

Two thumbs up for Mooch’s recommended battery vendors, but sometimes they are just not realistic. 2x LG HG2 from IMR would cost me, a minimum $56 CAN. Not to mention the risk of them getting confiscated at the boarder. I can walk to a local B&M, purchase the same LG batteries that are sourced from the same IMR vendor for a fraction of the price. If Mooch’s vendors are an expensive option, a little due diligence can go a long way – inquire with your B&M where they source their batteries from, and ask if they stand behind their product should you receive a dud or counterfeit cell.

They are visually identical to my other HG2s that still have Their origional wrap on them.

 

[Punk In Drublic]

They are visually identical to my other HG2s that still have Their origional wrap on them.

Cool

Just keep in mind that fakes are getting better at disguising them selves.

Can you identify the fake LG HG2 18650 Battery?