Which laptop battery pack yields the best, highest capacity 18650's

Since you say the pack is rated at 2200mAh, then they are probably standard 3.7V Sanyo UR18650A / R1112 cells. However, most of the Sanyo pulls I have seen with the purple insulating ring have been the UR18650ZT cells, which are rated at 2800mAh. Strange.

There’s an older pink wrapper Sanyo cell with a purple top that was commonly used in laptop packs a few years back. I’m thinking it was a 2250mah cell and I sometimes found them in packs where I expected to see red top Sanyos (2200mah). Some info on older sanyo cells from Boaz here.

Hey guys, i just cracked open a Lenovo battery pack and found 9 Panasonic ncr18650 MH-12210 grey color cells.
According to the info i found, these are 2,900mah cells.
I’d post pictures but i still don know how lol.

you are probably correct.
time to test them out.
are they above 3v each?
do you have an analyzing charger or a hobby charger?
and to post pics you have to host them somewhere and paste in the link using the button with the sunset pic in it.

Hi there snakebite!
The only charger that i have is the Xtar vc2, all the cells showed 3.46v~3.50v. According to the charger, most cells where charged to 2,840mah+. Each pair took about 5 hours on a 500ma current to charge.

sounds like winners to me.
my next step would be discharge at 1a to 3v and see what they deliver.
vc2 can only tell you what it put in.but its a good sign.

Nice score! I have a shed load of those and they take recharges forever and never die. :beer:

Hi there! They do seem to hold their own in my stock Convoy C8 (which is the main reason for me having the need for these cells) so that’s good, i charged them all up and have been rotating their usage. But for now they seem like really good cells!

Excellent Resource !
Also Individual 18650 capacity formula? | Best brand laptop battery for 18650 cells?

So, the formula to calculate individual cell capacity of a random Dell laptop battery:

Capacity: 85 WH
Rating: 11.1Vdc
85/11.1 = 7.66
9 Cells (3 parallel x 3 serial)
7.66/3 = 2.55
rounding up = 2600MaH cells.

Another:
Capacity: 58 WH
Rating: 11.1Vdc
6 Cells (2 parallel x 3 serial)
(58/11.1)/2 = 2.61
or 2600MaH cells

I found those cells in this one “Dell Latitude 60Wh Laptop battery T54FJ” one of my favorite pulls :slight_smile:

Excellent Resource !
Also Individual 18650 capacity formula? | Best brand laptop battery for 18650 cells?

So, the formula to calculate individual cell capacity of a random Dell laptop battery:

Capacity: 85 WH
Rating: 11.1Vdc
85/11.1 = 7.66
9 Cells (3 parallel × 3 serial)
7.66/3 = 2.55
rounding up = 2600mAh cells.

Another:
Capacity: 58 WH
Rating: 11.1Vdc
6 Cells (2 parallel × 3 serial)
(58/11.1)/2 = 2.61
or 2600mAh cells

Another:
Device: 2009 MSI Wind U100
Capacity: 49Wh
Rating: 11.1V
6 Cells (2 parallel × 3 serial)
(49/11.1)/2 = 2.21

The first 2 laptop battery packs I tried opening had the following:

1) HP PH06 [2010/03] 10.8v 4200mAh
10.8v 47Wh
6 cells (2 parallel x 3 serial)
=> 6x Sanyo UR18650A (2200mAh) [actual]

2) HP MU06 [2011/02]
10.8v 47Wh
6 cells (2 parallel x 3 serial)
=> 6x Samsung ICR18650-22F (2200mAh) [actual]

3) I’m just wondering what the laptop battery pack with the following labels will contain
(this laptop battery still in use, no plan to dismantle yet, but I’m curious what it may contain)
Lenovo (ThinkPad) 2012/05
11.1v 5.6Ah 63Wh
LG Chem 112711 11.1v 5300mAh min.
=> ?? 6x LG 2900mAh??

2650mAh
or 2600mAh actual.

Cool idea.

I wonder if there is any place to salvage high drain batteries :wink: Electric Scooters, power tools, other mechanical or heat producing applications probably, huh?

Yep, that is where the “good stuff” is, lol. I’ve salvaged some excellent high-drain cells from packs used in battery-powered lawnmowers, landscaping tools, vacuums, and drills/saws.
Brands include Kobalt, Ego, Echo, Greenworks, etc. The last one I opened was a Kobalt pack, and it had 20x Sanyo UR18650RX (20 amp) cells!

I know this is an old thread but I still have a question.
Recently opened up a laptop battery and
6- ICR18650 –22F Samsung SDI.
Can anybody tell me anything about these?

All the info you could ever want:

Data Sheet

HKJ review

Thank you very much for the info

While trying to figure out some not-so-well-known battery’s data sheet, I came across this site. It contains links to data sheets of a LOT of batteries, including some not-that-well-known ones:

Dell. Toshiba Lappies, Several times.
Gave me a mix of Sanyo 2600. LG 2200. and LG 2600.

All but ONE cell ever,were good, in over 10 yrs.

As said. “Named will always give named”.
To give the Named item it’s reputation.
Guaranteed.