More purple Samsungs here, ICR18650 28A, 6-cell, $9.99, I did local pick-up to avoid shipping charges.
Date code 2A32 (I forget where the decode info is). @2.85V
http://www.ebay.com/itm/190925009926
If you order, check before opening. I got the 4 cell batteries by mistake, they exchanged no problem except the one I ripped open before looking. 
They haven't changed the number available, so you might want to PM them first if you want several.
Yes it’s true, I just don’t want this awesome thread to die!
If you’re having a hard time getting batteries from China, this is an alternative.
This link is still active and seems like a great deal. If you buy 4 you get free shipping and I believe he’ll take $10 per pack…24 batteries for $40, so that’s $1.67 each for 2800mAh Samsung ICRs!!
Are the ones from the black packs any better than the ones from the white packs? I just did a runtime test comparison with these –28A’s and some of the green Sony 2200mAh cells from the HP 12-cell packs.
The Sony cells last just as long as the Samsung cells (60 min vs. 62 min in my Trustfire X9)
I just received one of these yesterday Battery Pack/ebay . It contained the same purple Samsung 2800’s as the original white packs.
When I checked the cells with a DMM there were two that measured 2.01, and the other four measured from 2.71 to 2.83. I decided to keep the two lower reading batteries separate when charging as a test. This was easy to do since I have an i2 and an i4 charger. I expected the lower reading cells to take longer to charge, but to my surprise they were fully charged MUCH sooner than the four higher reading cells. I even moved cells from bays 3 and 4 of the i4 to the i2, and it still took about an hour or so to finish the charge on these cells (I purposely left cells in bay 1 and 2 since the charge rate is higher than paired in 1 and 3 or 2 and 4). I guess that is a good example of the difference in the multi-cell charge rate between the i4 and i2 
.
Oh yeah, when the cells were all charged, all six read 4.21. Looks like they are good to try now.
Jim
Cool, I just ordered one for $17…under $3 a cell, not bad!
I offered $10/pack for 4, he countered $12, I offered $11, he declined.
Interesting, I made him the same offer about a month ago and he took it! Then I didn’t follow through… :~
Samsungs charged to 4.30v, Sony at 4.20v? If you don't have a 4.30v charger, run the Sonys down to 4.10v and do the comparison again.
The Samsung –28A from the white Acer Aspire packs is a 4.3v cell? This was never mentioned in the original thread for those packs. My i4 terminates at 4.16v.
This is the original thread for those packs, and the 4.3v info is in multiple posts on every page. Go back to page 1 and start over.
…
<_<
Well pooh. I feel silly now. Outside of a RC-pack charger, are there any affordable 4.3v li-ion chargers available? Or do I need to post a WTS ad?
Theoretically how much would I damage the –28A by using this charger from Fasttech?
I saw the cottonpickers charger while looking about, but I don’t have $50 to spend on a charger. But a charger that will charge to 4.35v is okay to use with the –28A?
4.35v is too much for these cells, just like 4.25v is too much for 4.2v cells. These will work fine at 4.2v but they lose a little capacity (~200mAh IIRC). I have several of the Samsung 28As that I gave to friends that have been using them at 4.2v without any problems. Don’t fret it!
There is also the $5 “budget” option (which I am using): CC/CV board
There are lots of good examples on how to set this up in that thread. This one is mine.
TGT, I have the charger you linked, the light changes colors at 4.3v (on mine) making it easy to get the right voltage in there.
Cool, oh, and HJK did a review of it. And Fasttech bundle it with batteries too. Seems like this charger definitely needs attentiveness though.
You actually have to work at it to get to 4.35v, like leaving them in there overnight, everything happens very slowly. Also, the 28A has a + or - .02 or .03v range (don’t have the spec sheet handy) so there IS some wiggle room there.
Very often I just charge them in my i4 though, they work great from the 4.19ish volts it goes to.
Well, I can’t find that charger anywhere else, so I’ll take my previously good luck and play the Fasttech lotto again it seems. 
Just don’t order batteries with it and it’ll probably make it to you just fine… 
Just bought another AS09D70 laptop battery, for storage should I just leave them in the pack or crack’em outta there and charge to 3.6v or so? Thanks!