On 10/17/2013 6:44 PM, Timsta wrote:
replying to JoeSchmoe, Timsta wrote:
nospamjoeschmoe wrote:

Have you ever opened up your laptop battery to replace the lithium ion
cells inside (if so, I could use the help as I'm stuck).
Here are the pictures of the operation on a Lenovo X61 tablet PC
8-cell 4500 amp-hour battery kidney-transplant operation.
The outside of the IBM Lenovo X61 tablet PC battery pack has the part
numbers:
- FRU 42T4507
- ASM 42T5209
And the batteries themselves, seem to have numbers on them of:
- cylinders BCM 3A6 72653
- rectangles C 3 171353
Any idea where to obtain these lithium ion replacement batteries?


Dear Joe I'd like Answers to the same Problem!

Executive summary...GIVE IT UP.

Details...
While getting the cells, be sure to pick up a battery tab welder.
Yes, you can buy tabbed cells, but the fit is usually too tight to
accommodate a solder joint at the tabs. Anybody recommending you solder
directly to the cells probably
races motorcycles drunk and has unprotected sex with $2 hookers.

Wear face protection. NOT GOGGLES. Wear a full-face helmet with
windshield.
Exploding cells can knock goggles right off...ask me how I know.

You could do this with NiCd cells. Lithium, not so much.
The protection chip is designed to thwart your efforts.
I've NEVER been able to make lithium pack work correctly.
Some dells, will power the computer, but the battery gauge doesn't
work and it gets rather warm on charge.
I've NEVER been able to get an IBM pack to wake up.
There's a program available to reprogram the chip.
IF it has a program for your pack.
IF you want to build a hardware interface and solder wires onto
the pack.
They claim to be able to do it. The program is priced for industrial
users, way above what's cost effective for a few rebuilds.

Quality cells will cost about as much a new aftermarket pack.
I've bought a few cells of various types of ebay. They were
mostly crap. You have no way of telling ahead of time.

I tried to get a quote from a local battery store.
They wanted to send the pack out of state to see if the guru
could actually do that one. Was gonna cost $20/cell plus whatever
the guru added on for the rebuild.

Rebuilding a computer battery pack is WAY more complicated than
replacing the cells in your dust-buster.

Did I mention, give it up?