[Sold out] 8 Purple Samsung ICR18650-28A $10 shipped

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TexasToasted
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Gj wrote:

Thanks Siskiyou, top notch find. Cool

 

TexasToasted wrote:
I just checked the tracking on my order and it shows “out for delivery”. Then the doorbell rings and I’m thinking, “It’s the mail man with my package!” I run down the stairs to the front door, where I am greeted by a gentleman named Mr. Menard who would like me to join the Jehovah church. :~ And no, he did not have my batteries.

Don’t leave us in suspense, did you join? Innocent

Nope. But I did finally get my 2 packs :bigsmile:
Opened up the first one- it was really, really well sealed/glued/cemented shut. Scuffed a few wrappers, but oh well.
I’m charging one now so I can test it’s capacity, but I’m just gonna leave the rest as they are, at 3.694V, and put them in cold storage. I had just ordered a half dozen cells from Mountain Electronics, then I saw the eBay deal for the green cells and got 10 of them, then I saw this deal and got 16 more cells.
I won’t need any more 18650 cells for a long time.

For anyone who feels they missed out on this deal, the green ones from eBay are really good cells. Just gotta keep an eye on his auctions to catch a good price.

stolikat
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These ASUS packs are brutal. I have tried that and it is really tight. I cant get a screwdriver in the gap. I may have to dremel it, but I didn’t want to do that.

Siskiyou
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stolikat wrote:
These ASUS packs are brutal. I have tried that and it is really tight. I cant get a screwdriver in the gap. I may have to dremel it, but I didn’t want to do that.

Ask your friendly local sasquash for assistance…

The area around the connector is the weakest spot. Crack it with pliers an the slip a narrow bladed screwdriver or the aforementioned chisel in the break. Pry till you have a piece you can hold on to with the pliers.

Just be careful, take your time, and smile instead of getting frustrated about how silly this is!

stolikat
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Whew! I got it open. Thanks guys that was a PIA!! I marred one of the batteries but I think it will be ok. Now to charge them.

DayLighter
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wow.. that was fast… only 3 days from CA to NY Love

The only way to do a great work is to love what you do.

blfdemigod
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Well, I ordered 6 battery packs and all were dated April 2011 Woooohooooo!!!! Deal of the decade!!! or at least of the year right?

Each and every cell measured between 3.68V-3.7V

Update: Actual assembly date from date code on batteries 2A51 is saying my cells were made

May 1st, 2010

and the actual production date (on bottom right corner of the grey sticker on the battery pack is

July-2010.

I guess the April 2011 date is when they came ready for distribution.

 

My collection 2 Small

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blfdemigod
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Ok after taking apart all my battery packs I have tips to expedite the process with pictures. First battery pack took about 40 minutes (this pack is very difficult to open). After devising a game plan (seeing where wires were when opening the first pack, etc...), I opened the next 5 packs each in under 10 minutes. Very fast and not 1 cell was injured! Here's the pics I took to help you guys who still haven't opened yours yet, so you can save alot of time taking these apart!

TAKE YOUR TIME!!!

WEAR GLOVES AND EYE/FACE PROTECTION!!!!

All you need are:

  • Flat head screw driver
  • Heavy duty Razorblade
  • Pliers
  • snippers or wires cutters (optional, makes cutting wires easier)

Heres what I did:

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Step 8

Step 9

Step 10

Step 11

Step 12

My collection 2 Small

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ImA4Wheelr
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Thanks for the tutorial Blfdemigod.  Those packs look like a pain in the behind to open.   Little worried about getting a short in that PCB though.   Doesn't seem wise to touch or break any of the circuitry prior to disconnecting all the cells.

I received mine today (wow, that was fast), but haven't even taken them out of the cardboard boxes yet.

moT
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All packs dated April 2011 all cells with 3.7v . :bigsmile:

ALL YOUR LUMEN ARE BELONG TO US.

blfdemigod
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ImA4Wheelr wrote:

Thanks for the tutorial Blfdemigod.  Those packs look like a pain in the behind to open.   Little worried about getting a short in that PCB though.   Doesn't seem wise to touch or break any of the circuitry prior to disconnecting all the cells.

I received mine today (wow, that was fast), but haven't even taken them out of the cardboard boxes yet.

Well, using the screw driver to pry the pack didn't really touch the pcb, even though it kind of looks like it did. Just slightly inserted the screwdriver where shown and twist Smile

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blfdemigod
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moT wrote:
All packs dated April 2011 all cells with 3.7v . :bigsmile:

Dremel I am guessing? Nice job btw, but I had to take my apart in the house (I use the built in computer nook area in our apartment for my workshop), with the wife and baby asleep, lol.

My collection 2 Small

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BLightSam
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Good show, blfdemigod!

moT, how did you peel back the battery “cover”?

stolikat
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BLightSam wrote:
Good show, blfdemigod!

moT, how did you peel back the battery “cover”?

Ya nice work on that tut. That’s pretty much how I finally was able to get mine out. So they are on my i4 charging right now. Wink

moT
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BLightSam wrote:
Good show, blfdemigod!

moT, how did you peel back the battery “cover”?

Ran the three sides around its corners on bench grinder till it started exposing gap most way around. Then went a couple shallow passes on the round side opposite the connector to give it a bend point.

ALL YOUR LUMEN ARE BELONG TO US.

moT
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blfdemigod wrote:

moT wrote:
All packs dated April 2011 all cells with 3.7v . :bigsmile:

Dremel I am guessing? Nice job btw, but I had to take my apart in the house (I use the built in computer nook area in our apartment for my workshop), with the wife and baby asleep, lol.


Awsome Job blfdemigod with hand tools.

My first thought was hack saw it slightly in the middle and snap it in half then decided it be better to spew plastic filings all over the garage floor using the bench grinder.

ALL YOUR LUMEN ARE BELONG TO US.

BLightSam
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moT wrote:
BLightSam wrote:
moT, how did you peel back the battery “cover”?
Ran the three sides around its corners on bench grinder
Maybe I should take the pack to my dentist ?! :bigsmile:
M4D M4X
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dchomak wrote:
If it is any consolation, this same seller has this ASUS 8 pack also for $9.99. Rated at 4400 mAh. So it probably only has 2200’s in it. Don’t know what brand, but probably also Samsung. http://www.ebay.com/itm/Original-ASUS-Battery-90-NYX1B1000Y-A42-N82-K52-A31-B53-A31-K52-A32-K52-A32-N82-/111267236770?pt=Laptop_Batteries&hash=item19e80b4ba2

What cells could be in here?
6 cells – 4400 mAh

and THX to moT and blfdemigod for their nice pics

PLEASE NOTE
i do not work in "reviews, deals and codes" for the time being
maybe M4D M4X will return one day, but until then:

THANK YOU FOR YEARS OF YOUR SUPPORT AND FRIENDLY CONTACTS!

dchomak
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M4D M4X wrote:
dchomak wrote:
If it is any consolation, this same seller has this ASUS 8 pack also for $9.99. Rated at 4400 mAh. So it probably only has 2200’s in it. Don’t know what brand, but probably also Samsung. http://www.ebay.com/itm/Original-ASUS-Battery-90-NYX1B1000Y-A42-N82-K52-A31-B53-A31-K52-A32-K52-A32-N82-/111267236770?pt=Laptop_Batteries&hash=item19e80b4ba2

What cells could be in here?
6 cells – 4400 mAh

and THX to moT and blfdemigod for their nice pics


They call it a battery for a Dell, not an original, authentic Dell. So it probably has junky “UltraFire” type cells in it.
jmpaul320
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thank you for the guide demi god… i would have never been able to open this thing without it

it seems i nicked the wrapping of EVERY battery… beginners luck!

i covered any gouges with elec tape for now… i guess ill invest in some wrappers from illuminationsupply soon to rewrap the cells

charging them all up now

how do you guys remove the 4 burrs that are left at each pole? or do you leave them there?

i guess i just worry about a small piece of metal becoming dislodged and causing a short.

Would you mind keeping the wrong flashlight?
Best wish, May
Tmart service team

 

Soumil wrote:

PLEASE HELP ME GEARBEsT! IM LITERALLY CRYING!

 

Siskiyou
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M4D M4X wrote:

What cells could be in here?
6 cells – 4400 mAh

and THX to moT and blfdemigod for their nice pics

That would have 2 banks of 3 cells in series. so 4400mAh/2 = 2200mAh cells

Based on the description I’d agree 100% with dchomak, it is a cheap aftermarket replacement and will have inferior cells. But, not all aftermarket replacements use cheap cells. It the states we have brands like Denaq or Maxcapacity that are quality replacements using high quality cells. Check out this interesting video of a battery factory tour. At one part they speak of a Polish branded pack using panasonics…

blfdemigod
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jmpaul320 wrote:
thank you for the guide demi god... i would have never been able to open this thing without it it seems i nicked the wrapping of EVERY battery... beginners luck! i covered any gouges with elec tape for now... i guess ill invest in some wrappers from illuminationsupply soon to rewrap the cells charging them all up now how do you guys remove the 4 burrs that are left at each pole? or do you leave them there? i guess i just worry about a small piece of metal becoming dislodged and causing a short.

No problem, I was like wow this pack is impossible to open compared to all the other packs I ever opened. For the metal burrs on the end, I used my dremel and slowly sanded them down, then used my hft stick polish and the dremel cotton buffer disc and made it nice and shiny! Better than brand new looking!

My collection 2 Small

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BLightSam
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What’s the capacity of this 4.35v battery when charged with 4.2v charger?
Is this equation not applicable?

2800 mAh * (4.2/4.35) = 2703 mAh — only 100 mAh less

B42
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No, look to this site for the reviews: http://lygte-info.dk/review/batteries2012/Samsung%20ICR18650-28A%202800m...(Purple)%20UK.html

Essentially they are really approximately 2600mAh, and when charged to 4.2, approximately 2400mAh.

GregY
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BLightSam wrote:
What’s the capacity of this 4.35v battery when charged with 4.2v charger?
Is this equation not applicable?

2800 mAh * (4.2/4.35) = 2703 mAh — only 100 mAh less

No. The battery isn’t flat at 0V and the discharge curve isn’t linear.

Look at some of HKJ’s battery reviews, he actually shows the amount of current (and also energy) batteries put out when discharged at different rates. For 4.35V batteries, he shows that information for the battery charged to 4.35V as well as for the same battery charged to 4.2V.

BLightSam
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Thanks B42, GregY.

According to the linked page, this is not 2800 mAh but
2600 mAh w/ 4.3v, and 2400 mAh w/ 4.2v.

Under ‘Test with 4.2 volt charging”:
When only charging to 4.2 volt the battery looses about 220mAh in capacity.

[EDIT]
HKJ
09/20/2012

Test / Review: Samsung ICR18650-28A 2800mAh (Purple)
http://budgetlightforum.com/node/13448

Mike11148
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Just finished capacity results on the first 2 batteries.Both charged to 4.16 volts with the i4 charger. I used the LittoKala Engineer 260 for discharge capacity and internal resistance and results are very good.
Battery 1 IR = 53 and 2380 MAH
Battery 2 IR = 51 and 2409 MAH

Mike11148
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I’m not sure how accurate the IR numbers are from this LittoKala battery tester,but brand new panasonic cells are in the same range as these batteries.My conclusion is that these batteries are slightly better than the Panasonic CGR18650CG that I got last week.They measured 2210 MAH and in the low fifties IR values.I do have some very old sony laptop pulls that are supposed to be 2250 MA and only measure 1100 MA and the IR values are over 100.

alphazeta
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moT -> GENIUS w/ that bench grinder suggestion!

I’m really glad I happened to read ur post b4 opening my pack w/ hand tools. After reading ur post I went to my grinder & ~15 minutes later (probably took that long b/c I kept checking to not grind too deep into the pack) the pack opened up like a can of sardines! My fingers especially thank you (probably my last pack was a real boar to open w/ hand tools.) I didn’t open up the pack any further after getting the plastic shell open. I’ll save that for tomorrow when I’m fresh and alert.

Anyhow, great call on using a grinder. Smile I’m definitely going to use these method for opening pretty much ALL future packs.

moT
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((partial quote))

alphazeta wrote:
After reading ur post I went to my grinder & ~15 minutes later (probably took that long b/c I kept checking to not grind too deep into the pack) the pack opened up like a can of sardines!

Glad it worked well for you too.

On my second pack i target the slowest first the two sides of pack at the ends of cells. then the two inside corners near the connector in the front. After its just seconds to complete the rest of the front. Take a few shallow passes across the back to make a bend point. Otherwise your can of sardines will try to keep the lid closed. :bigsmile:

ALL YOUR LUMEN ARE BELONG TO US.

BLightSam
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