High quality strange looking Li-Ion cells. What are these?

Hi,

I have around 12 new laptop packs that all have these odd looking cells, I have tested them and they perform really well considering their size and capacity but I have no idea what they are except that they are Li-Ion based. Does anyone know what they are?

They are rated at 1800mAh but this is the only information I have.

I ran a 2A discharge and as you can see they hold their voltage really well and their temperature only raised by a few degree's C. Their IR is 47mOhm based on the EBD A20H or for a better comparison they have 15% more IR than a new Samsung 26F. I compared these to other high quality branded18650's and statistically they are comparable just with less capacity obviously.





They have a central negative anode and the main body is the cathode, opposite to what you would typically expect and they use an all metal casing which isaround33x47x9mm.

Theyremind me of those "dual 18650" looking Boston Swing cells.

These are Panasonic prismatic cells. Found a Sell pack with these a while ago

I only capacity tested one at 1A and Opus reported 1500mAh

I think the ones I have are knock offs though as they have no branding and the capacity does not match plus the anode is slightly different. At least I know what they are supposed to be though, thanks.

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Looking at the data sheet from Panasonic the genuine version of this cell looks good. I didn't think the ones I have performed badly but the Genuine ones can handle 5A and still give over 1900mAh! These things are tiny!

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I think I may have the lower capacity Sanyo version, there seems to be lots of different 103450 prismatic cells that all seem to use the exact same red tape :s . I did a 1A discharge and it had no noticeable effect on the capacity so they are probably less than 1800mAh and more than 2A capable.

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Mine read EKBP26 34758

They could be Sanyo. More likely than Panasonic..

ThePowerSource said:

Hi,

I have around 12 new laptop packs that all have these odd looking cells, I have tested them and they perform really well considering their size and capacity but I have no idea what they are except that they are Li-Ion based. Does anyone know what they are?

They are rated at 1800mAh but this is the only information I have.

I ran a 2A discharge and as you can see they hold their voltage really well and their temperature only raised by a few degree's C. Their IR is 47mOhm based on the EBD A20H or for a better comparison they have 15% more IR than a new Samsung 26F. I compared these to other high quality branded18650's and statistically they are comparable just with less capacity obviously.





They have a central negative anode and the main body is the cathode, opposite to what you would typically expect and they use an all metal casing which isaround33x47x9mm.

Theyremind me of those "dual 18650" looking Boston Swing cells.

Click to expand...

I also have 28 of these, I wasn't sure how to test them or what i could use them for.

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ThePowerSource said:

Hi,

I have around 12 new laptop packs that all have these odd looking cells, I have tested them and they perform really well considering their size and capacity but I have no idea what they are except that they are Li-Ion based. Does anyone know what they are?

They are rated at 1800mAh but this is the only information I have.

I ran a 2A discharge and as you can see they hold their voltage really well and their temperature only raised by a few degree's C. Their IR is 47mOhm based on the EBD A20H or for a better comparison they have 15% more IR than a new Samsung 26F. I compared these to other high quality branded18650's and statistically they are comparable just with less capacity obviously.





They have a central negative anode and the main body is the cathode, opposite to what you would typically expect and they use an all metal casing which isaround33x47x9mm.

Theyremind me of those "dual 18650" looking Boston Swing cells.

Click to expand...

I also have 28 of these in three different variations, I wasn't sure how to test them or what i could use them for.

chuckp said:

I also have 28 of these in three different variations, I wasn't sure how to test them or what i could use them for.

Click to expand...

I just tested one of them on Opus.. required 2 slots but worked just fine. I might wire it up for my son's drone.. it has a 500mAh LiPo battery and this would be a decent upgrade.

I find these a lot in really thin flat packs but the only info I could find online was from a seller on aliexpress. Had to match em by the picture but they listed em as Sanyo as well. Haven't tested any of mine yet but I was gonna see if could make a really thin power bank for my phone or iPad maybe. Can't think what else to use them for since I only have about 20.

Thenagain, what's weird is a lot of laptop batteries will mix these with the standard Sanyo heaters I've seen. So I guess I could put em in the packs with the rest of mybatteries. Now I just need really thin holders.

I have collected about 50 or so of these cells. I like the design and the fact that they have fuse build in.
Originally they are Sanyo 103450 and most of my tested at 1600-1700 mAh, and when I collect enough I may just build the pack for ups or related project.
Keep it in mind the positive is on the outside.

chuckp said:

ThePowerSource said:

Hi,

I have around 12 new laptop packs that all have these odd looking cells, I have tested them and they perform really well considering their size and capacity but I have no idea what they are except that they are Li-Ion based. Does anyone know what they are?

They are rated at 1800mAh but this is the only information I have.

I ran a 2A discharge and as you can see they hold their voltage really well and their temperature only raised by a few degree's C. Their IR is 47mOhm based on the EBD A20H or for a better comparison they have 15% more IR than a new Samsung 26F. I compared these to other high quality branded18650's and statistically they are comparable just with less capacity obviously.





They have a central negative anode and the main body is the cathode, opposite to what you would typically expect and they use an all metal casing which isaround33x47x9mm.

Theyremind me of those "dual 18650" looking Boston Swing cells.

Click to expand...

I also have 28 of these, I wasn't sure how to test them or what i could use them for.

---

ThePowerSource said:

Hi,

I have around 12 new laptop packs that all have these odd looking cells, I have tested them and they perform really well considering their size and capacity but I have no idea what they are except that they are Li-Ion based. Does anyone know what they are?

They are rated at 1800mAh but this is the only information I have.

I ran a 2A discharge and as you can see they hold their voltage really well and their temperature only raised by a few degree's C. Their IR is 47mOhm based on the EBD A20H or for a better comparison they have 15% more IR than a new Samsung 26F. I compared these to other high quality branded18650's and statistically they are comparable just with less capacity obviously.





They have a central negative anode and the main body is the cathode, opposite to what you would typically expect and they use an all metal casing which isaround33x47x9mm.

Theyremind me of those "dual 18650" looking Boston Swing cells.

Click to expand...

I also have 28 of these in three different variations, I wasn't sure how to test them or what i could use them for.







These should fit in any regular sprung loaded charger that accepts the smaller cells.

Click to expand...

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OhmGrown said:

I find these a lot in really thin flat packs but the only info I could find online was from a seller on aliexpress. Had to match em by the picture but they listed em as Sanyo as well. Haven't tested any of mine yet but I was gonna see if could make a really thin power bank for my phone or iPad maybe. Can't think what else to use them for since I only have about 20.

Thenagain, what's weird is a lot of laptop batteries will mix these with the standard Sanyo heaters I've seen. So I guess I could put em in the packs with the rest of mybatteries. Now I just need really thin holders.








I was thinking of using copper tape/stripped wire/copper braidand just soldering them together, I do not think I have that many either or at least not at the moment.

Click to expand...

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I found some nice LG cells whilst I was opening some of the laptop packs I am selling but I am not sure what they are, I have searched via the info on the cell but found nothing. :huh:

Ive found both types aswell. The red ones i put in a slot of my 4bay tester.

The larger silver ones i have tested by soldering a cable on it and plug them into the 4bay charger via an adapter. It can be a bare piece of wood with screws at the end as a contact.
I use thes packs for powering my ts100 soldering iron and it works great and lasts forever...

This is a good idea!