26F/26C and 28A have about the same capacity when both are charged to 4.2v, is there any data on whether the 28A will have a longer service life than 26F/C when used under the same conditions?
Lenovo branded 42T4690 (11.1v 3900mAh 44Wh) --> 6x Panasonic Prismatic CGA103450A @ 1950mAh (1x 0.00v 2x 2.2v 1x 2.6v 2x 2.7v)
These, according to the series name in this datasheet, are LiCo cells, which might make me look like an idiot for doing this.
some info from Keeppower about these
I got some of these from a Toshiba laptop about a month ago.
Any circa 2011+ ultrabook will most likely carry cells like these in their packs. Too bad there's no host to accommodate them :P
I am still working on getting you guys updated in the spread sheet. Some have been updated and will try to get the rest tomorrow and tonight
A Li-ion powered [pistol grip] spotlight? Dremel-out the peaks in a SRK battery tube and put a coupleafew of those in? A test-bench for driver and LED tuning?
Thanks, I’ve never seen those before. Interesting alternative to the pouch-cells that Apple seems to have switched over to.
What is the problem charging them in that charger? The datasheet lists 3.7V nominal, 4.2 charge termination.
Would the thread be somehow less informative if the updates were placed in the first post instead of the second?
I have bee tossing around that idea for a couple days now. When I get a chance I will switch them around. I wish I could add another editor to the spreadsheet post.
The change could better for some. When I open a thread it is only the new posts and in reverse order (except for the original post (post zero). So it is better if the original post is an intro or is packed with info/links and not packed with large images. This also reduces the download streaming requirement at my end - and on the website.
You can try throwing it up on a google docs spreadsheet with public edit and link to it in the OP (iframe embed doesn't work)
And probably try what I've been doing and have all the images in an album like on imgur/flickr or some sort.
I guess its a pretty unconventional look, seeing these cells in a charger that doesn't have the 103450 size in their supported list :P.
I went ahead and switched the 0 post and the #1 post, tell me if you guys like this better.
Nice! 
£3.10 from Ebay including delivery!
Contained 6 x CGR18650CG.
Light green colour, all measured 3.9v.
Manufacturer: Fujitsu
Battery pack: AH531 Lifebook Part no. CP477891-03
Rating Battery Pack: 10.8V
Cell name inside : Panasonic CGR18650CG
Cells mAh: 2250?
One cell was slightly scraped during removal and the metal beneath the casing is exposed. If I wrap it in packing tape would that render it safe for use?
I will add this to the OP.
OK thanks for info.
Great forum for by the way!
Got 3 packs from Hagg911's WTS thread, delivered in person by ruffles.
3x Lenovo branded 42T4619 (10.8v 7800mAh 85Wh) --> 27x Sanyo UR18650FM (9x 3.84v 9x 3.96v 8x 4.00v 1x 3.99v)
I would totally hop on his sale again, but I already have TOO MANY batteries! :P However I do suggest you to get packs from him if you're looking for a pack to pull from.
List updated thanks everyone.
After 30 minutes shuffling through the battery packs at our local used PC shop, I only found two packs that seemed new enough to be interesting, so I paid $1 each and took them home to tear open.
The first has the ASUS part number AL32-1005.
Inside I found pretty much what I was expecting. 2,800 mAh cells, specifically, LGDC118650s in ugly greenish brown wrappers.
Next up, an HP TD06 pack. Most of the TD06 packs in the bin had a 10.8v nominal voltage. This one had a 11.1v nominal voltage, and so I assumed it was newer.
The pack was made in china with Korean batteries, but which kind? Inside, I found 2,800mAh cells, as expected. Specifically, they were lavender-wrapped Samsung ICR18650-28As, which have a 4.3v termination voltage.
I’m leaving the circuits intact for now, because I want to see if I can read out some information from the battery management boards and see how that relates to the voltages, capacities, internal resistance and self-discharge rates of the individual cells.
I’ll update the blog posts (linked to above) once I’ve got that info.
Pack Summaries:
Asus, AL32-1005; 11.25v, 5600mAh, 63Wh 3s2p; LG, LGDC118650, 2800 mAh
HP, HP TD06; 11.1v, unspecified mAh, 62 Wh, 3s2p; Samsung, ICR18650-28A, 2800 mAh