18650 Manufacturer/Datasheet?

[edpalmer42]

I've got a 3 year old battery for my laptop.  One pair of cells has gone bad so I'm going to replace them.  Before I do so, I'd like to check the datasheet for the specs.

I've tried to find this manufacturer, but no luck.  I even tried TinEye to match the logo.  The battery pack came from China, so I'm assuming the cell manufacturer is also Chinese.  The pack reports that the cells are Sanyo.  Probably not.   

Anybody recognize this logo?

Ed

[anishkgt]

Looks like a fake Sanyo. Probably a chineyo [emoji16]

Moreover I've not seen logo on well know branded cells.


Sent from my iPhone using Tapatalk

[amyk]

https://fefirstbattery.en.alibaba.com/
http://www.firstbattery.com/en/
https://fccid.io/UL/FAR-EAST-FIRST-NEW-ENERGY-CO-LTD ... passes UL safety tests. Not too bad.

According to the datasheets you can find in the second link, 6E61214 is a 2000mAh cell produced in May 12 2014.

[A@ron]

Even if you were to get another 2000 mAh cell keep in mind that the other cells in this pack are 3 yrs old and might be much lower capacity. Without capaciting testing the others on something like an Opus you might still have some cells which are low capacity and will drag the rest of the pack down under use.

Shame you're in Canada as I've got a hoard of 18650s and a battery tab welder here

[edpalmer42]

https://fefirstbattery.en.alibaba.com/
http://www.firstbattery.com/en/
https://fccid.io/UL/FAR-EAST-FIRST-NEW-ENERGY-CO-LTD ... passes UL safety tests. Not too bad.

According to the datasheets you can find in the second link, 6E61214 is a 2000mAh cell produced in May 12 2014.

Thanks, amyk!  That's definitely the right company.  Odd about the capacity, though.  The battery is claimed to have a capacity of 4400 mAh and is a 4S2P configuration.  That would imply a 2200 mAh cell.  Whatever.  I've seen a lot more 'creative' battery capacity values!   

Ed

[edpalmer42]

Even if you were to get another 2000 mAh cell keep in mind that the other cells in this pack are 3 yrs old and might be much lower capacity. Without capaciting testing the others on something like an Opus you might still have some cells which are low capacity and will drag the rest of the pack down under use.

Shame you're in Canada as I've got a hoard of 18650s and a battery tab welder here

Way ahead of you A@ron.  I *do* have an Opus and I'm in the process of measuring the 3 good pairs.  I use a DIY adapter that allows me to measure the pair without disconnecting everything.  The first pair measured 3.7 ah - down from 4.4 ah after 3 years.  I scrounged some laptop batteries and came up with a few good pairs.  I'll pick the pair that matches the other ones the best.

I've just finished rebuilding a second battery for this laptop.  The original batteries were Sanyo from 2007!     One pair was dead, but the other 2 pairs measured 3.0 and 3.1 ah!  One of the scrounged batteries had Sanyo cells from 2008 with the same capacities.     Will wonders never cease!

Ed