Our recent get together of friends led me to a epiphany about laptop batteries. They are all messed up! One friend asked me about her laptop battery which could barely hold a charge. Then another, then another. I didn't manage to fix any of their laptops while they were here, but we took some apart to see what was going on inside. After our friends left I searched around for replacement cells and picked some up from ebay. Now with ten minutes of time and $30 of replacement cells I can repack a battery. This video shows the process. I should mention that lithium ion batteries do have the potential to burst into flames although I've not seen anything more than a little sparking :). Now my little ibook which could hold a charge for 10 minutes lasts over four hours!
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9 comments:
hi, happy new year !
Thanks for the video, and for the idea...
What is the capacity of the remplacement cell ? Is there any constraint here ?
and the name/artist of the music ?
I like this project. Too many electronics companies charge a fortune for what should be a really cheap part!
One thing though. It's hard to read the text in the video - especially the fine print under some of the titles. Would it be possible to make the text larger and leave it on screen longer? I found myself having to jump back multiple times just to read the text.
My batter with 1300mah cells. I replaced them with 2600mah cells. They are wired two in parallel and three sets in series so roughly a 10.8V power supply with 5200maH capacity.
The band is LCD soubdsystem - the the track is "Yeah, Yeah, yeah" - crass version
Hey there, I can't seem to find batteries like the ones you found. I looked on ebay and looked through digikey and mouser.
can you help me find some cells?
Thanks
James
I have been purchasing 2600mah cells from all-battery.com. The 3.7V 18650's with tabs.
great, thanks!
I now have a new dilemma. In searching for cells I came across this
this
which is actually cheaper than 6 cells from all-battery.com
however, it's only 4400 mAh
How do I figure the mAh for the pack made from the individual cells. Is capacity summed by series or parallel?
The cells I have been using are 2600mah and due to the way most batteries are wired:
- 3 sets of pairs in parallel
- the sets are connected in series
My battery has a 5200mah capacity.
$32 is a pretty amazing price for a 4400mah setup.
My ibook originally came with a 2600mah capacity.
Keep in mind that if you have a lithium charger you can also put those old cells to use for something other than your laptop.
Your video gave me the idea to do the same for my iBook G4 1.2 GHz! But I don't quite understand how you wire cells in parallel and serie. Also, is there a maximum mAh? The stock battery is 4400 mAh. Can I put for example six 3000 mAh cells like those you can find on ebay or would it break my computer?
http://cgi.ebay.ca/18650-3000mAh-RECHARGEABLE-BATTERY-CELL-3-7v-Li-ion-x6-/120649951848?pt=US_Batteries&hash=item1c174c2a68#ht_499wt_914
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