18650s

[lrd3]

so a wile back i had ordered the wrong battery pack for my lap top. i was unable to return it so i ripped it apart for the 18650s i got 6 of them out of it.... they seem to be pretty good batts all and all. but honestly i own alot of 18650s. lol... does any one know anything about these ones... they read=
lgds218650
fe13201558
ck092d852
is what is written on these ones.... came out of a Hewlett Packard laptop battery pack i think...
they do seem to work well. i just never used them do to the fact that i am fairly well stocked on 18650s.... i just revisited them due to a a post in a dif thread...

 

[breaktru]

What do they look like? Any kind of label or generic looking? Price wise, would it be worth it for me to buy a laptop battery pack and rip it apart? Most laptop batteries don't hold up too long from my past experience. I wonder if it's the quality of the batteries or the drain.

 

[Papa Lazarou]

What do they look like? Any kind of label or generic looking? Price wise, would it be worth it for me to buy a laptop battery pack and rip it apart? Most laptop batteries don't hold up too long from my past experience. I wonder if it's the quality of the batteries or the drain.

How do you use your laptop? I doubt the laptop manufacturers use Ultrafires - they probably mostly use decent quality cells - Samsung's, Panasonic's, Sony and the like (I know Sony had a little problem with exploding laptop batteries a few years ago..). I'd think a combination of heat and being kept at full charge continuously (i.e used predominantly on AC power as a desktop replacement) is what causes many laptop batteries to have a shortened life span.

 

[breaktru]

I've been using laptop for years and know a lot of people who do also. Before I bought a laptop, I was aware of the problem with leaving it always plugged into to an AC outlet so I always fully charge and drain routinely. It helped but not a cure to the problem. I have 3 laptops presently. Short life on all 3. Sony Vaio, Toshiba and a Dell. Not cheap models either.

 

[lrd3]

the only writing on them is this
lgds218650
fe13201558
ck092d852
fresh of the charger there reading 4.02 to 4.03 which is well bellow my aws that are 4.20 or my trust fires at 4.13
Ive read that these are about 2200 mah... but honestly don't know anything about them.

 

[breaktru]

Maybe they are coming off the charger as 4.02v because they are 3.6v batteries. I found this: https://shops.ecorner.com/epages/sa...ectPath=/Shops/sabahoceanic/Products/14087001

 

[lrd3]

i stand corrected.. or just wrong..lol... off the charger there showing 4.18 . . . .oops wrong ones earlier..lol
they measure about 65 mm x 18 mm or in America there 2 9/16" x 11/16" ish
about the same as the aws

 

[mdocod]

Cells pulled from reputable laptop manufactures will generally be pretty decent quality cells from reputable name brands. Once removed from the pack, they are no longer protected cells (the packs contain global protection circuits), so you will need to take extra precaution in making sure not to over-discharge or over-charge or short circuit them.

If they can hold above 4.15V a few days after being removed from the charger, then they should be in pretty good shape.

You mentioned you already have a large stockpile of 18650s. The best thing you can do for extra cells that you really don't need is to discharge them to ~3.9V, put them in protective container and slip em in the fridge for long term storage. Or, if you have a cool dry place in the house that would also be good. Rotate a few cells for your regular use, when they start to wear out, drop em off at your local hazardous waste collection and pull another set out of your stockpile.

Eric

 

[lrd3]

thanks for the tips...

 

[Rocketman]

If it's a real HP battery pack it may have quality 2200mah UNPROTECTED cells in it. If it was an ebay clone pack then it probably has cheaper UNPROTECTED cells in it.

 

[lrd3]

it was a real hp ... they have some venting up top (pos side) and what looks like a protect circuit cap.... haven't peeled back the wrapper on any of them though.... hmmmm..maybe when one is def crapped out i will. i hate dissecting good batts for no reason... i did use one all day on one of my home made wood bottom feeders about 5 mil on a lr 510 .... its reading 3.76 now....

 

[Rocketman]

The 3.76 comment means you have a voltmeter. Good. Anyone playing with batteries needs a meter. How do some of these guys survive playing with Li-ion cells and no meter. Play safe, and Happy Holidays.

(groove in plastic at positive end? thats a crimp groove)

 

[lrd3]

i really couldn't imagine "playing" around with this stuff without a meeter. i make alot of my and my friends mods so a meeter is a must...lol