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| Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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17th Jan 2023, 12:58 pm
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#1 |
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Octode
Join Date: May 2017
Location: St Austell, Cornwall, UK.
Posts: 1,018
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Li-ion 17670
Does anybody know where I can buy 17670 Li-ion Cells?
Plenty of compatible chargers out there, but the Cells seem illusive. Ian |
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17th Jan 2023, 1:27 pm
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#2 |
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Dekatron
Join Date: Aug 2003
Location: near Reading (and sometimes Torquay)
Posts: 3,099
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Re: Li-ion 17670
Remember that "Li-ion" is not a single thing, so you need to decide which kind you want.
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17th Jan 2023, 2:17 pm
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#3 |
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Octode
Join Date: May 2017
Location: St Austell, Cornwall, UK.
Posts: 1,018
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Re: Li-ion 17670
Well, I can't say what the exact Chemistry is, as even the Data sheet doesn't say,
but it won't be anything Modern and exotic like Li-poly ect. The Cells I need to replace, are from a 1999-2000 Toshiba Laptop and have a nominal voltage of 3.6-3.7. with Max charge voltage of 4.2, so pretty standard stuff for old school cylindrical cells. I would guess they are LiCoO2 which fits in with these being Sony Branded Cells of that period. Ian |
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18th Jan 2023, 2:20 pm
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#4 |
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Heptode
Join Date: May 2015
Location: Bradford, West Yorkshire, UK.
Posts: 512
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Re: Li-ion 17670
Deft work and "garden type" 18650?
__________________
worried about the electrons entering the circuit and the smoke leaving  Andrew |
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18th Jan 2023, 2:38 pm
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#5 |
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Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,966
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Re: Li-ion 17670
17670 is an unusual size which I've never come across. Almost all laptops use battery packs built around 18650s.
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20th Jan 2023, 12:46 pm
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#6 | ||
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Octode
Join Date: May 2017
Location: St Austell, Cornwall, UK.
Posts: 1,018
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Re: Li-ion 17670
Quote:
Quote:
A quick Ebay search brings up dozens of compatible chargers without it seems any reference to the 17670 Batteries themselves. I think I have found a solution though, in the form of 16650's which are still available. So a fraction smaller theoretically (which is handy) and actually 2000mAh instead of the original 1500mAh. Batteries are ordered, so will see how this works out. Ian |
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15th Feb 2023, 12:07 pm
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#7 |
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Octode
Join Date: May 2017
Location: St Austell, Cornwall, UK.
Posts: 1,018
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Re: Li-ion 17670
And indeed it worked out pretty well.
Still a bit fiddly even with 16650's, so even if I had found the original 17670's it would have been a very tight squeeze and probably would have ended up bulging the plastic Battery Case somewhat. So, original Battery Pack was 1500 mAh, and the new Cells are 2000 mAh, so a 33% increase in capacity, give or take. On the first test, the little Laptop ( Toshiba Libretto ff1100 ) ran for about 2 hours playing music on it's very small speaker. This Laptop is Tiny. Floppy Disk shown for scale. Ian |
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