BLF Community Battery Pulls Overview Thread (Laptop packs and Tool Packs)

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! :smiley:

£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?

Yes, you can also use shrinkwrap,
see HKJ’s tutorial: Tutorial: Rewrapping a battery

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.


Album link

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

I’m shooting for some other way using an MCU but no luck so far. It should be doable though. I’ll post something when I’ve made demonstrable progress.

I’ve posted another pack teardown. This one is a ACER AS11B5E battery pack I picked up on eBay.

This pack is a bit unusual. Its an internal pack, but unlike most internal packs, its made with 18650s, rather than pouch cells.

One benefit is that its really easy to get in to. I just had to peel some tape off the thin shell.

Inside, I found eight Panasonic NCR18650A 3,100 mAh cells. Not bad for a $22 new-old-stock pack!

Or perhaps it wasn’t such a deal after all. The pack voltage was ~7.7v, which wouldn’t be bad if this were a 3S pack. On an 4S pack though, that works out to less than 2v a cell. In retrospect, I can now see why the seller wasn’t asking more for the pack, and now that I’ve gone back to check, I see that they have other NOS packs of the same type for almost 2x the price. No mention though that it was marginal

I decided to give it a slow charge to 12V at 200 mA, which didn’t take long. Overnight, the voltage settled to ~11.6v. I am taking it up to 14.8v now at 660mA, which is probably where I’ll leave it until I manage to read out the pack info over SMBus. Then I’ll separate the cells and do a couple rounds of tests.

Pack Summary:
Acer, AS11B5E; 14.8v, 6000 mAh, 87Wh, 4s2p; Panasonic, NCR18650A, 3,100 mAh

Thanks EAS, I will get the OP updated asap.

Not to drag this too far off topic, but I’ve made some progress. I was able to get this info out of one of the $12 acer packs:

I need to figure out how to interpret the manufacture date. I also want to figure out if I can get the individual voltages for each parallel bank, and also how to deal with string data, like the manufacturer and serial number.

Once I do, I’ll clean up the code a bit and share it.

Went back to the flea market

Album Link

Apple iBook A(?)O62 (14.4v) --> 8x Panasonic CGR18650CA (2x 0.00, 1x 3.87v, 2x 3.83v, 3x 3.81v)
Dell branded JWPHF (11.1v 56Wh) --> 6x Samsung ICR18650-26F (5x 3.87v, 1x 3.62v)
Dell branded X284G (11.1v 48Wh) --> 6x LG LGDAS31865 (4x 3.50v, 2x 3.48v)
Solomon Technology BTP-X31/TH-3500A (10.8v 3500mAh) --> 9x Toshiba 4/3A 1.2v NiMH Cells
Generic Toshiba TS-M2 Replacement (??v ??Wh) --> 6x Moli ICR-18650H (6x 3.91v)

Downlinx I updated my other posts with VDC and mAh/Wh info (#65 #71 #80 #84 #100)

sorry i missed this, i will get everything updated.

A friend of mine, not a member here, but into flashlights none the less sent me these pics of a 40V Kobalt battery pack that HE found in the Lowes recycle bin. It was only half full with only 10 cells. The cell info is scribbled onto a piece of paper on the desk. The pack claims to be 2.0AH, that would mean those are 2000mAh cells. He claims there is also a 4AH version of this pack, so that one would be full with 20 cells.
This pack, like the one I found appears to be brand new




Been doing some pack pulls over the last few weeks. Laptop packs were acquired from friends and tool packs courtesy of Home Depot

Acer AS10D41

10.8v 4400mah

6 Sony 2200mah

US18650GS

T6GS23SK08Y

All 3.94v

Ryobi 5 cell lithium ion tool pack

LDGAH11865

M284J115AG

All 0.4v JUNK

Pretty disappointed with the Ryobi, pack looked new.

Downlinx reported the following pack to produce Sanyo double red while gauss163 indicated panasonics. I got Sanyos in the first one and Sony's on the second.

Dell BATDWOOL

Type 6T473

14.8V 6450mah

12 Sanyo red top 2200mah

9 @ ~2.8v, 3 @ 0v

Dell BATDWOOL

Type 6T473

14.8V 6450mah

12 Sony 2150mah

SF US18650GR

T G5146LJ24H

All @ 0v

Makita tool pack

18v 3ah

10 IMR “konion” cells

1500 mah

SF US18650v

T V1110NK25N

1 dead cell, pooched 1, dented 2, six @ 2.85v

No self discharge

4.4 A on DD XM-L2

6.4 A on DD XP-G2 triple

Lost three high drain cells due to clumsiness!

More Later,

Brian

Dell Y4367 11.1V 80WH
9x LGDA2E 18650 2400mah

Thanks for the patience everyone, too a bit but everything has been updates.