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AR15.COM
4/11/2026 2:42:07 PM EDT
I've soldered a good bit before, but figure I'd rather pay someone who knows what they are doing.

Got an old Dell laptop battery I'd like rebuild with new lithium cells.
Callsign-ChuckYeager
That man is a homo and a liar-TrojanMan
Hell, a Ford just breaks down on you. It doesn't fall apart AND try to kill you at the same time-Bloodsport2885
4/11/2026 4:59:35 PM EDT
[#1]
I'd advise against changing the chemistry. Every chemistry charges differently, and the circuits and controls for your current battery packs won't be appropriate for the new batteries. Possibly dangerously so.
"As God is my witness, I thought turkeys could fly." A. Carlson
4/11/2026 7:13:13 PM EDT
[#2]
Quote History
Originally Posted By R2point0:
I'd advise against changing the chemistry. Every chemistry charges differently, and the circuits and controls for your current battery packs won't be appropriate for the new batteries. Possibly dangerously so.
View Quote

Thanks it is already LI ION though. Just need to rebuild it as its flashing the orange battery light.
Callsign-ChuckYeager
That man is a homo and a liar-TrojanMan
Hell, a Ford just breaks down on you. It doesn't fall apart AND try to kill you at the same time-Bloodsport2885
4/11/2026 8:24:43 PM EDT
[#3]
is it a removable battery?
4/11/2026 8:54:45 PM EDT
[Last Edit: GraboidHunter][Edited] [#4]
That's a hard no from me on rebuilding lithium battery packs.   In most laptops these days they aren't really serviceable. They are slimmed down, custom size, smushed, and glued into whatever place the manufacturer could fit it.   Also known as "spicy pillows".

Just buy a replacement battery for your model and try to avoid random chinese sellers.    

Some laptops will also require you to do a battery condition and reset procedure which usually involves a bit of voodoo.

My laptops currently all have the batteries disconnected to mitigate fire risk.
4/11/2026 11:51:29 PM EDT
[#5]
Quote History
Originally Posted By forager:
is it a removable battery?
View Quote

Yes and is about 8-10 years old.  The case can be split, and its not swollen.
Callsign-ChuckYeager
That man is a homo and a liar-TrojanMan
Hell, a Ford just breaks down on you. It doesn't fall apart AND try to kill you at the same time-Bloodsport2885
4/12/2026 12:56:15 AM EDT
[#6]
Quote History
Originally Posted By Chromekilla:

Yes and is about 8-10 years old.  The case can be split, and its not swollen.
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By Chromekilla:
Originally Posted By forager:
is it a removable battery?

Yes and is about 8-10 years old.  The case can be split, and its not swollen.


There’s no upside to manually gutting a LiIon battery. Save your house and buy one on eBay.
God's children are not for sale.
4/12/2026 1:04:37 AM EDT
[#7]
New replacement laptop batteries on Ebay are cheap.
4/12/2026 8:57:30 PM EDT
[#8]
I had a 2013 vintage Dell, and it's battery contained 18650 cells joined with metal strips spot welded on.  If it's still charging, the cells can be replaced.  If it's not charging, there could be an issue with the internal charging board.
4/13/2026 3:27:26 PM EDT
[#9]
most older dell models can be found at parts people online they sell old dell stock stuff.  however I will note yours is getting pretty old.

I would replace it myself before putting a battery in it
4/14/2026 4:08:05 PM EDT
[#10]
So, yeah, they can be rebuilt.  Just use the same type of cells, of course.  Can look for higher capacity ones, hopefully the charging circuit is smart enough to adapt, if needed.

I was tempted to do that for an old-ass laptop I have laying around.  Got some used good cells from something else, never got around to doing the rebuild.  I can still find cheap batteries on ebay for my 10-15 year old laptops, so I haven't bothered to rebuild those.
Award: 24/365 Most likely to be an appendix.

"Dealing with Congress is like trying to have an adult conversation about the credit card with your alcoholic bi-polar Ukranian import wife."
4/14/2026 4:44:25 PM EDT
[Last Edit: Chromekilla][Edited] [#11]
My thoughts is wouldn't a used or new battery for a ten year old laptop be in the same state or worse than my current 10yo battery I am replacing?

Dell has end of life'd my batteries some time ago.
Callsign-ChuckYeager
That man is a homo and a liar-TrojanMan
Hell, a Ford just breaks down on you. It doesn't fall apart AND try to kill you at the same time-Bloodsport2885
4/14/2026 5:30:58 PM EDT
[#12]
OP, Laptop Battery Express  sells new batteries for older laptops.   I replaced one two years ago in a Dell E6440, for $102 delivered, and it is working just fine.
4/14/2026 5:59:34 PM EDT
[#13]
Quote History
Originally Posted By Fox:
OP, Laptop Battery Express  sells new batteries for older laptops.   I replaced one two years ago in a Dell E6440, for $102 delivered, and it is working just fine.
View Quote

Thanks that looks like the ticket.
Callsign-ChuckYeager
That man is a homo and a liar-TrojanMan
Hell, a Ford just breaks down on you. It doesn't fall apart AND try to kill you at the same time-Bloodsport2885
4/17/2026 10:40:07 PM EDT
[#14]
Dell's have an internal board that if it loses power, will not recognize the new cells and the battery is essentially worthless. Like a previous poster mentioned, it requires some voodoo.
4/18/2026 9:58:30 AM EDT
[#15]
sounds like you are wasting your time and money to me

and risking a fire

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