Samsung INR18650-30Q new in box resting voltage

sbslider · 2018-06-09T13:30:36.000Z

I received two Samsung INR18650-30Q from Li ion wholesale yesterday, and was a bit surprised at the product. I will say I have very little experience with Li ion cells in general, having only previously purchased a few Olight cells. So the 10 smaller (16340, 18350) cells I have purchase all came charged to around 3.9V. The 30Q came charged to 3.5V. Also, for some reason they have a sticker over the label. I have heard nothing but good things about Li ion wholesale, so I am not super alarmed, but just wondering what one would normally expect a new cell voltage to be.

bushmaster · 2018-06-09T13:52:53.000Z

That’s the usual voltage for a nib unprotected 18650. All my Samsung and LG cells arrive at just over 3.5 volts.

sbslider · 2018-06-09T15:10:40.000Z

bushmaster:

That’s the usual voltage for a nib unprotected 18650. All my Samsung and LG cells arrive at just over 3.5 volts.

that is what I hoped, thanks for confirming it. :+1:

atbglenn · 2018-06-09T15:29:07.000Z

I just got 4 from LiIonWholesale. Same thing as yours. Nothing to worry about. Jon knows his stuff and would never sell anything fake. I’ve been a customer of his for 2 years now. Made over 20 orders. Never once had a problem.

sbslider · 2018-06-09T15:28:11.000Z

atbglenn:

I just got 4 from LiIonWholesale. Same thing as yours. Nothing to worry about. Jon knows his stuff and would never sell anything fake. I’ve been a customer of his for 2 years now. Made over 20 ordered. Never once had a problem.

that is what I have heard, but I figured it would be good to double check. thanks for the response!

atbglenn · 2018-06-09T15:30:27.000Z

Sure thing my friend

WalkIntoTheLight · 2018-06-09T15:35:19.000Z

The stickers are required by shipping standards, at least for air shipping. All cells must be clearly labelled. Not sure about surface shipping.

And yeah, 3.5v is about what they have to be shipped at now. 30% state of charge (or less). It used to be 40%.

Some shippers (especially from China) don’t do things by-the-book. I couldn’t care less about labeling, as long as they’re packed properly. I’ve had loose cells from China that could easily have been damaged.

If you’re getting the labels, chances are they’re doing the other more important things properly too.

sbslider · 2018-06-09T15:41:59.000Z

The vapcell 18350s only had a pre printed vapcell sleeve on them, so that was different. and the vapcells came at 3.9V, so I wondered. But it looks like all is normal, I just did not have any experience purchasing 18650s, so I learned something, which is always good.

Enderman · 2018-06-10T01:06:51.000Z

Lithium batteries are usually all shipped at 30% charge.

klrman · 2018-06-10T02:51:46.000Z

Enderman:

Lithium batteries are usually all shipped at 30% charge.

Except thrunite batteries, I've had three flashlights from them come with 4.1V.

Enderman · 2018-06-10T03:28:29.000Z

klrman:

Enderman:

Lithium batteries are usually all shipped at 30% charge.

Except thrunite batteries, I’ve had three flashlights from them come with 4.1V.

That’s actually pretty dangerous, and also bad for their lifespan if they were stored for months or years at full charge like that.

klrman · 2018-06-10T04:10:07.000Z

Enderman:

klrman:

Enderman:

Lithium batteries are usually all shipped at 30% charge.

Except thrunite batteries, I've had three flashlights from them come with 4.1V.

That’s actually pretty dangerous, and also bad for their lifespan if they were stored for months or years at full charge like that.

I'm always a little cautious with them, especially after I read on amazon I think or maybe it was youtube, but someone said his thrunite battery popped.

BlueSwordM · 2018-06-10T05:04:38.000Z

If they stayed charged at 4.1V(I mean on a 4.1V power supply), that is really not good for the cell.

If it self discharged down from 4.2V to 4.1V, then it is a little better.

One thing though: is it not illegal to ship cells at higher than nominal voltage?

klrman · 2018-06-10T05:11:27.000Z

Why is it not good for a cell to charge it to only 4.1V? Lately I have set my charger to 4.1V instead of charging them to the max.

BlueSwordM · 2018-06-10T05:14:38.000Z

Charging it to 4.1V for use is actually really good for cycle life.

By doing this, you easily double cycle life.

What I meant is how some cells are constantly connected to a 4.1V supply in storage, which degrades them more quickly then if kept at 3.6V in storage.

klrman · 2018-06-10T05:27:56.000Z

BlueSwordM:

Charging it to 4.1V for use is actually really good for cycle life. By doing this, you easily double cycle life. What I meant is how some cells are constantly connected to a 4.1V supply in storage, which degrades them more quickly then if kept at 3.6V in storage.

Oh, I see, makes perfect sense. I never even knew some have their flashlight batteries connected to a power source whilst in storage.

LightUpTheDark · 2018-06-13T17:07:40.000Z

I just recently ordered 6 samsung 30Q’s from Liion Wholesale too (4 to feed the BLF Q8 and 2 to feed other single cell quad emitter light) and they came with 3.5-3.65 volts. My question is why it takes so long to get past 3.7 volts or doesn’t seem to charge at all on my Nitecore D4 charger. The 4 to feed the Q8 was in the charger for an hour and saw it barely cracking 3.7 volts and the charger was hot as well as the cells… took them out and re-inserted them and placed a small fan on medium speed. They finally reached full charge 6 hours later. I know the D4 charger’s max charging is 375 mA per channel when all 4 are being used but should it take that long… more like why did it barely charge the cell’s in the first hour (stayed on the first bar blinking on the indicator screen)?

What was also odd was that when I went to charge the remaining two samsung 30Qs, it did the same thing… I had to remove the batteries again (sat their just blinking away at 3.6 volts for an hour) and reinsert them to get them charging. Only this time, with 2 cells, the charging current was 750 mA. Took about 3-4 hours to charge just the 2 cells.

May have to buy a new charger with higher charging current (Folomov A4, I’m looking at you).

SIGShooter · 2018-06-14T04:41:02.000Z

If the batteries were fully drained I can see 6 hours at 375mA (375 * 6 = 2,250mAh) and not all of that is going into the batteries. It sounds like a lot was going into heating the charger

Could be the voltage showing on the D4 is way off. Perhaps you can check it against a DMM when you next charge fully drained batteries.

The batteries are probably hot due to the charger being hot. Is that normal for D4’s?

LightUpTheDark · 2018-06-18T21:23:29.000Z

My other 18650’s (AW 2200 mAh) don’t get as nearly as hot or cause the charger to get as hot. I usually run them past 3.5 before charging. My 3 Eagletac Red Tops 3400 mAh 18650s in the Thrunite TN41 don’t get hot either (but warm). It’s probably is time for a new charger for the samsung 30Qs… .

Speed4goal · 2018-06-18T23:19:59.000Z

klrman:

Why is it not good for a cell to charge it to only 4.1V? Lately I have set my charger to 4.1V instead of charging them to the max.

What enderman was getting at. Is the cells were fully charged. And sat for months or year or so it kills the capacity. I’ve seen this with cells I’ve misplaced for months. And when I’ve found them lost 400 or 500 mah. They should be lowered to the factory voltage. If your not going to use them in the next month. But having a couple hundred cells I don’t really worry about it. The recycle bin will give me plenty of new and slightly used cells to replace them

But yes in every battery spec sheet it has a table and they store it for 30 days. And the recovery rate is usually 85 to 90 percent or higher. leaving them at full 4.2 charge. Lithium cells don’t like to be fully charged for months on end. Some spec sheets go by the next charge and discharge cycle some do 3 charge and discharge cycles to see the recovery rate of the mah
If you go to 18650batterystore they pretty much have all the spec sheets on the cells you want. Imr batteries use to link them but they don’t anymore. You can learn alot by spec sheets on various cells.

Charging to 4.1 will get you some more cycles out of the battery and a little easier on the cell. That’s about 90 percent charged. Your not losing much mah