Newer-vs-older Matshita Lappy DVD/CD

**PCBONEZ** · 10-13-2009, 10:54 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

The LI cells used in laptops are done [shot] in ~2.5yr +/-1yr even if never used.
I don't remember the explicit details but basically the chemicals break down slowly with time regardless of charge condition or charge-discharge cycles.
-
LI Laptop batteries is one thing to never buy NOS.

I keep confusing you with 370forlife because he used to be a cat and now your a cat and he's a potato or something.

.

**ratdude747** · 10-14-2009, 03:45 AM

Re: Newer-vs-older Matshita Lappy DVD/CD

not true about batteries. see my outdated sig. that one is still good.

so was the one in the micron TranSport trek2 i had last year. it was made in the days of PII.

its all about how much you use the battery the more you use it, the better your cells will be down the road. if you are keeping it on the charger for an extended period oif time, then out with the battery until you will have it off the charger.

**kc8adu** · 10-14-2009, 05:51 AM

Re: Newer-vs-older Matshita Lappy DVD/CD

li-ion cells can store fairly well if discharged to about 30% .
i got a fujitsu tablet pc that had never been sold.it had been on the shelf about 7 years at the place i got it.
both batteries are still fine.
they deteriorate fastest at full charge and high temps.like in a laptop that is never turned off and the battery left in it.

**Junk Parts** · 10-14-2009, 06:30 AM

Re: Newer-vs-older Matshita Lappy DVD/CD

Well from what I've been told, my lappy was run on its charger with the battery in most of the time. There is some voltage that the battery must have before the lappy will even try to charge the main pack. Don't remember what this voltage is for my unit but the main pack must still be over this value because it says it still charging. The problem is that it never charges up enough to boot the unit because of the three dead cells.

**Wizard** · 10-14-2009, 09:12 AM

Re: Newer-vs-older Matshita Lappy DVD/CD

Matshita disc drives belongs in the trash. I had poor success with these. Even the market shied from that long ago.

Cheers, Wizard

**PCBONEZ** · 10-14-2009, 09:39 AM

Re: Newer-vs-older Matshita Lappy DVD/CD

Sorry,
You folks are AFU when it comes to Lithium-ion batteries.
Here's a simplified version.
http://www.batteryuniversity.com/parttwo-34.htm
There are more in depth discussions of the chemistry if you care to look.
-
-> The oxide forms in cobalt-based lithium-ion batteries even if the battery isn't used.
-> The manganese-based lithium-ion batteries breakdown with time for other reasons.

**PCBONEZ** · 10-14-2009, 09:40 AM

Re: Newer-vs-older Matshita Lappy DVD/CD

Sticking cobalt-based in a pack designed for manganese-based [or vise versa] probably isn't a great idea either.

**PCBONEZ** · 10-14-2009, 05:44 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

Originally posted by ratdude747

not true about batteries. see my outdated sig. that one is still good.

so was the one in the micron TranSport trek2 i had last year. it was made in the days of PII.

Old stuff like that usually used NiMH, not LI, as original.
Even older stuff had NiCd.

**ratdude747** · 10-14-2009, 06:41 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

it was li, btw. so was the compaq in my sig.

**PCBONEZ** · 10-14-2009, 09:34 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

Original in the Transport was a NiMH so you don't have the original battery.
Possibly the same situation with the Compaq.
LI replacements for NiMH originals isn't unusual.
I used to see that often with Gateway Solo 9100/9150 and earlier models.
.

**Junk Parts** · 10-15-2009, 05:42 AM

Re: Newer-vs-older Matshita Lappy DVD/CD

I busted the Gateway pack apart, and it has red Sanyo Li-ion cells in it. Set my VOM to the 20v dc scale and tested each cell. All of them came up dead. Next I set it to the 2000m dc scale. One battery gave me a reading of .04 on this scale. Needless to say all the cells are now in the recycle bin. I did put the battery back together so it couldn't start a fire with its 0 volts dc output. Found a used battery for the C640 for $39.95. or a new one for $79.95. These are made in the USA batteries I'm told. You know how that goes. The plastic is made in the USA but the cells are made in China.....

**PCBONEZ** · 10-15-2009, 07:22 AM

Re: Newer-vs-older Matshita Lappy DVD/CD

You don't want a used one and you don't want one with an old date code.

If you don't ~REALLY~ need to use it in places without AC available I wouldn't even get a battery.

I looked into rebuilding the Gateway packs myself back when I refurbished Gateway Laptops on the side. [I quit that in 2002.]
It wasn't cost effective over just buying rebuilt packs unless I bought the batteries in 1000 piece quantities.
So, I wouldn't even try that unless I need one for a model no one makes one for.

I've used several rebuilt ones [old casing, new cells] and they worked very well.
Give me about a day and I might remember the rebuild companies name.
.
BMI? BMC? BCM? - something like that.
They are the OEM source behind several brands of rebuilt laptop batteries.
~ If they are even still around....
.

**ratdude747** · 10-15-2009, 02:56 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

how would you take one apart? i have the lion for the trek2 still. i also have 3 batteries for a dell inspiron 7500 that died (same brand as the refurb company you mentioned, i think they still exist, i think its called btc).

the trek 2 looked original since all the trek 2 laptops on ebay had that model. but it did look a bit 3rd party as well.

the compaq battery is compaq made, original.

the reason i ask is since my ibm t22 battery is hosed and i have numerous batteries to dead laptops of the same chemistry, id like to perhaps make a working battery.

**Junk Parts** · 10-15-2009, 03:26 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

A local "Beauty School" went under and was selling off all their stuff. Good C640 units were selling for $150. This one had all of its passwords set by a former student and they couldn't test it out because of this...LOL I wonder who their IT person was...Anyway this one was $40 because of this. I filled out a change of ownership form on the Dell website then I called them. They then gave me the backdoor passwords for my lappy, and I was able to trash all the passwords set in it then and there.
Now I just like for all my old PC junk to work as designed. Guess I don't need a battery. When the wife and I go on long car trips the Lappy could be run off a cigarette lighter power adapter just as well. I wonder if my ISP offers wifi so she can do the net on the road?

**Junk Parts** · 10-15-2009, 03:33 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

I don't know about your battery RatDude. My Dell battery had kind of a lip clip built into the edges of the two halfs of the battery case. On top of that the Dang thing was also glued together. I got into my pack with sharp thin knives, and a lot of luck.

**PCBONEZ** · 10-15-2009, 04:01 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

Compaq made doesn't make it original bro.
Believe it or not some people by replacements from the manufacturer.
If you can dig up some old ads that would be more conclusive.
I don't know [or care] about what that model came with I'm just saying the same name on the parts doesn't prove anything. You have to dig.

Laptop batteries are usually a serious B*TCH to get apart.
They are not intended to be serviceable - by anyone.
Often they have an interlocking tab -all the way around- AND glue.
Some are plastic-welded [melted] together.
- Exacto knife, small flat-tips, maybe a butter knife or two, possibly a hacksaw blade,,,,
,,, and lots and lots of patience!
-
If you end up having to cut it open do it by going over and over the same spot[s] with a sharp knife. [Don't poke it through, you'll bust open a cell or damage the PCB in there.] - A saw blade would remove too wide a path of material and you may not be able to glue it back together when you are done because the two halves won't touch.

BINGO! - BTI is correct!
Their rebuilds are good.
.

**PCBONEZ** · 10-15-2009, 04:07 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

http://www.batterytech.com/
Last I checked [which wasn't recently] it was less expensive to buy from someone they supply via OEM than to buy directly from them.

**PCBONEZ** · 10-15-2009, 04:11 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

Originally posted by Junk Parts

I wonder if my ISP offers wifi so she can do the net on the road?

Just park in front of Starbucks. - LOL

**ratdude747** · 10-15-2009, 04:36 PM

Re: Newer-vs-older Matshita Lappy DVD/CD

ok. for the compaq (armada 1750), the manual i found for it on hp's site said it was lithium ion.

since when did starbutts have free wifi? last i checked all they had was tmobile hotspot.

theese places have it free:

qdoba (mmm...)
panara bread
bob evans (no shit- see the back of the menus by the dessert section)
chick-fil-a (some stores, mainly in larger cities)
some hotels/motels
some taco bells
bw3 (id rather play trivia though... another thread someday...)
speedway gas stations
most public libraries
staples
barnes &noble
borders books (?)
pilot truck stops (?)(free?)

non-free wifi:

flying J truck stops
mcdonalds

maybe we should have a thread on free wifi...

oh, and where can you find cheap batteries of decent quality? im thinking of buying a second one for my eee pc.

Newer-vs-older Matshita Lappy DVD/CD

Newer-vs-older Matshita Lappy DVD/CD

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