Icr18650

Wellllllllll i had nothing to do so i decided to open up a battery pack from a dell inspiron 1525 (i think)
to see what kind of batteries are in there and i found these!!
China Samsung SDI 2600mAh 18650 3.7V Li-ion Battery Cell (ICR18650-26), 2.6Ah 18650, ICR18650-26F manufacturer.
Samsung 3000 mAh 18650 Testing ( dont know if its the same one i got)

6 of them :yh:

I got some Sammy 22E's, but I also got me a low-cycle-count used pack chock full o' sanyo 2600mAh cells! :evil:

Either way, score!

If it was a used pack, I'd measure each cell to make sure it was stored at a suitable voltage, or to see any self discharge that is higher than nromal.

its from my old laptop
i got a new one 2 months ago
so had nothing to do with it... so ya
ill test them when my multimeter gets here

BTW, many higher-performing flashlights run off of 18650 cells. In case you now need something to power with those cells.

I'm just wondering if you didn't use the packs how you know for sure they are "low-cycle-count" I mean ?

BShanahan14rulz said:

I got some Sammy 22E's, but I also got me a low-cycle-count used pack chock full o' sanyo 2600mAh cells! :evil:

Either way, score!

If it was a used pack, I'd measure each cell to make sure it was stored at a suitable voltage, or to see any self discharge that is higher than nromal.

Click to expand...

I booted up the computer that the packs went to. Almost all computer laptop packs implement a version of Texas Instruments' Li-Ion cell health system. One of these chips stores information like the two temperature sensors' readings, whether the thermistor has tripped, how many cycles the cells have, etc.

Some systems include a utility to read the information from this chip and display it on the computer. When I found this new-looking pack in our inventory marked "Used-dead", I plugged it in and saw it had ~40 cycles. Sweet!

it was a "9-cell" pack for a Lenovo R61, had 7x2600mAh Sanyo cells. SWEET!

hmm does anyone know how to remove the sticky things that hold the batteries together?

Hey bluuray,

After reading this, I grabbed a bunch of laptop batteries from work and took them apart. In some cases, there is nothing wrong with the cells, but the small circuit board reports issues in error. I have 40 18650's in front of me as I type and all but 5 of them show as holding a charge of 4.1V. These were all from Dell machines. I'll have to buy a charger for these now...

To remove the bridge plates, I use a small pair of needle nose pliers, grab the edge, and roll it. This will pull the plate without lifting/denting the case. It will leave sharp little points which you can push down on a metal surface, or file them down by hand.

Hope that helps....

Zen

i already removed those...
i was talking about the double sided tape thing that is holding the batteries together

That stuff's a beach. All I can say is, very carefully and slowly.