need data sheet for a battery

[chris gareau]

LGR18650U

there r 8 of these in my laptop's battery pack, I want the data sheet 4 them

 

[chris gareau]

vary helpful!!!!!!!!!!!!!!1

 

[Coyoteboy]

vary helpful!!!!!!!!!!!!!!1

Maybe if you didnt basically demand things people might be more inclined to
help! If you learned to google *for yourself* you'd find the very FIRST
result says: "LGR18650U has high capacity (2200mAh), highenergy density
(470Wh/L) and long cycle life" and that it is a lithium ion cell. Id suggest
that if you cant operate google sufficiently well to get that information
that you may be lacking the skills with which to use the information. Or
maybe you're just lazy? Who knows, either way I hope the info is helpful for
you.

 

[Coyoteboy]

P.S. since the pack specifies 14.4v and 4400mah, and Lithium ion batts
normally come in 3.6v cells, id say it has a pair of 4-cell strings in
parallel to acheive those ratings.

HTH.

 

[chris gareau]

P.S. since the pack specifies 14.4v and 4400mah, and Lithium ion batts
normally come in 3.6v cells, id say it has a pair of 4-cell strings in
parallel to acheive those ratings.

HTH.

I didn't mean to sound rude, was just trying not to wast time.

I did find that stuff in google, just not information like a schematic
for some support circuitry, I want to reverse engineer my battery, maybe
make it use different battery technology, li-ion r good as long as u
don't care about using them past 3 years.

I thought a full data sheet would have a schematic for some kind of
support circuit so I had some information to use to understand what I am
looking at.

if u know where I can find that information it would be great

 

[Coyoteboy]

chris gareau proclaimed to alt.electronics ...

I didn't mean to sound rude, was just trying not to wast time.

I did find that stuff in google, just not information like a schematic
for some support circuitry, I want to reverse engineer my battery, maybe
make it use different battery technology, li-ion r good as long as u
don't care about using them past 3 years.

It does tend to come across wrong when you try not to waste time - remember
people will put in as much effort in their answer as you do in your
question.

Its only a battery pack, its just a bunch of cells. The problem is that
lithium cells have huge power density and long life in comparison with
other types - 3 years is a good span for any battery pack in constant use!

Draw out the circuit yourself since you have the top off. I suspect it will
only be:

2x ---[cell,cell,cell,cell]--- in parallel, maybe with a few take-offs at
part way along for lower-voltage supply.

 

[PeterD]

I didn't mean to sound rude, was just trying not to wast time.

I did find that stuff in google, just not information like a schematic
for some support circuitry,

If you wanted support circuitry, then why didn't you ask for support
circuitry?

I want to reverse engineer my battery, maybe
make it use different battery technology, li-ion r good as long as u
don't care about using them past 3 years.

vs. what for more than three years?

 

[Otto Sykora]

Draw out the circuit yourself since you have the top off. I suspect it will

only be:

2x ---[cell,cell,cell,cell]--- in parallel, maybe with a few take-offs at
part way along for lower-voltage supply.

I dont think this will be so simple.

I have taken appart some of similar packs, but there is often quite
lot of electronics inside. One of the packs I have taken appart was
from a video camera and it definitely employed a microcontroller based
circuity.

I remamber that I wanted buy such cells alone few years ago, in order
to build some power supply for a national mountain day radio event. I
could not find any suppliers who were willing to sell me those cells
unless I would deposit complete engineering drawings of the charging
circuit for the resulting pack.

Ballancer is what they call the circuit in general, it is needed
otherwise there is a danger of overheating and explosion.

 

[Coyoteboy]

Otto Sykora proclaimed to alt.electronics ...


Our experiences differ then im afraid, because I've pulled several laptop
battery packs apart - not one has had electrickery in it, only cells. Maybe
the camcorder had a built-in charger circuit to reduce the cost of the
charger adapter?

Li-Ion batts need current limiting (both on charging and discharging) for
safe working, but if you buy like-for-like, i.e. not putting li-ions where
nimh were, and getting similar capacity cells, I'd bite my own arse if you
had problems.

Mail order Li-Ion cells in normal cell sizes:
http://www.eurobatteries.com/sitepages/description1.asp?id=1165&cat=NIMH

HTH.
J