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Sony US18650GR (G6) Cell Specifications
#11
Keep stumbling upon these cells on ACER battery packs. So far, I have liberated around 50 cells, NONE of them being of ANY use! What's wrong with them SONYs?
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#12
(02-12-2018, 07:26 PM)thanar Wrote: They were sitting at around 1.5V for quite some time so had to go slowly on them.

^^ there is your mistake there. The chemisty changes when you drop below the cut off voltage, the bigger the drop and the period of time within that drop zone will determine how badly the chemisty has been changed, most people that know what they are doing will throw away batteries that test below 2.5v on the inintal test. Batteries that have altered chemistry are unpredictabity and from a safety point of view, best to avoid.

If you have a lot of recoverable cells like you said then the best thing to do is change your source, if purchasing of eBay beware a lot of people selling laptop batteries in bulk, often they will sell them as 'untested', generally they say this because they know full well that the batteries in them are not very good, they normally pocket the good ones, you can quickly learn from a batch which are good and what are bad even before opening them, for example, if you have HP M06 and 3 laptop batteries test faulty out of 10, then the chances are the rest will fail to because they have come from the same source.
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#13
(09-17-2017, 09:17 PM)TAGG Wrote: ...
G2 1600mAh
will add picture when i find one. I am 99% sure that i have some...

I have eight US18650GR G2H that I just liberated from a Apple clamshell ibook battery pack from circa 2000.



Pack cover has the following text:
iBook Lithium Ion Rechargable Battery
model no M7426
*NI950SB6HHHA
825-4927-A
© 1999 Apple Computer
Made in Japan

There are no watt, amp, or volt specs on the machine or pack itself, however Everymac says this model ibook had a 45 wh pack, so roughly  5.625 Wh per cylinder.

(ed i just realized there are already pictures of G2H in the actual G2 thread... )
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#14
(09-16-2017, 04:51 AM)fcbrand Wrote: I keep finding references that Sony uses different G Ratings to rate the cell capacity.  Here is what I have found so far.

G4 = 2000mAh
G5 = 2200mAh
G7 = 2400mAh
G8 = 2600mAh

The Cell shown above has a G7 rating making it a 2400mAh cell.
The battery Pack I dismantle belongs to Acer laptop Model #: BATBL50L6. The battery as a whole is rated as 4000mAh and had 6 batteries inside. if we devided 4000mAh by 6, we will get 666mAh for each cell. The cell according to the marking is: SF US18650GR T G41490J181. It should be 666mAh not 2000mAh. and as we all said sony batteries are soo confusing..but that is how i caculate each time i harness batteries..
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#15
Quote:The battery Pack I dismantle belongs to Acer laptop Model #: BATBL50L6. The battery as a whole is rated as 4000mAh and had 6 batteries inside. if we devided 4000mAh by 6, we will get 666mAh for each cell. The cell according to the marking is: SF US18650GR T G41490J181. It should be 666mAh not 2000mAh. and as we all said sony batteries are soo confusing..but that is how i caculate each time i harness batteries..

shhamad,

No the pack is a 4000mAh pack . You need to calculate how the batteries are arranged.
With 6 cells they are in a 3s2p configuration. The amperage comes from the 2p which is 2000mAh X 2 = 4000mAh. The voltage comes from the 3s configuration which should be 11.1 or so.

So yea the battery pack is correct.
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