Samsung 30A VS Samsung 30A [ 3000mA 18650 ]

[old4570]

As the title suggests , this is about the Samsung 30A [ 3000mA ] @ 4.2v and now [ after doing a mod to my Soshine charger ] @ 4.35v . To say its like chalk N cheese would be an understatement .

I was impressed by the Panasonic 2900 , @ 3.5Amp discharge in my SSC P7 I was sure I had seen the best there was to see , but I was wrong . The Samsung 30A @ 4.35v [ Fully charged ] toped that by quite a margin , in fact the power curve is just fantastic . In all fairness , 3.73Amp discharge in my SSC P7 is just out of this world , that is about a full Amp more than the usual run of chinese made cells .



Discharge comparisons [ Cold ]

Samsung 30A @ 4.2v

XR-E R2 = 1.5A
XP-G R5 = 1.92A
SSC P7 = 3.1A

Panasonic 2900 @ 4.2v [ Fully Charged ]

XR-E R2 = 1.68A
XP-G R5 = 2.01A
SSC P7 = 3.12A

Samsung 30A @ 4.35v [ Fully Charged ]

XR-E R2 = 1.83A
XP-G R5 = 2.2A
SSC P7 = 3.25A

If you buy a high performance light , the question begs , why you would buy low performance batteries . At $23USD shipped for a Pair , I dare say the Samsung makes the IMR look some what redundant [ 18650 ] , the only problem is going to be in charging the battery to full capacity . So if you dont want to mod a charger [ as I had to ] , you may have to go Panasonic .

I certainly hope that this information is of some use to everyone , and helps to put your battery choice into some perspective . If you want balls to the wall POWER , you have to go Japanese Cells , there just is no other option if you want real performance , and the Samsung 30A certainly can perform .

:candle:

 

[^Gurthang]

4570,

Very interesting. Couple of questions: 1) Where did you buy your cells? 2) Do you have a link to any Samsung data sheets?

Curious to know more about these cells. And yes, they do stretch into the IMR territory...

 

[psychbeat]

Dang- I JUST bought 2 more AW2600s..

how hard is it to mod the charger?

I guess it would mean having a dedicated "hi power"
charger which would have to be factored into my costs
of changing to this set up.
I dont even have any DD lights right now anyways, but
my NB Linger module runs@ 2.8A to the emitter so its
pretty thursty.

 

[old4570]

Panasonic and Samsung are available on Ebay [ VIA HK sellers ] , looks like there is a bit of a surplus in the laptop sector ..

I modified one channel in my Soshine charger , [ SC-S2 ] , unfortunately its not stable . The 5M variable resistor is ?? , overly course in its adjustment . And getting it to hold 4.36v open circuit is difficult , it seems to want to hold 4.3v , its the variable resistor .. I might try 2x2M ohm resistors [ piggy back ] to make a 4M resistor [ variable ] and see if it allows for finer tunning .

Care is needed as a little too much adjustment and you have 12v open circuit and that would =

I was able to get the battery to 4.35v , but I had the charger adjusted to 4.4v to do it as the resistor would not hold 4.36v , so not a real long term solution ATM . I will keep working on it .

http://www.samsungsdi.com/battery/cylindrical-ICR185650-30A.jsp I really dont know where there is a data sheet .

If you do a Google search , you will see a lot of re-sellers/wholesalers selling the Samsung 30A , looks like there is finally a glut in the laptop battery market .

 

[jasonck08]

The reason the Samsung shines, is it has the highest nominal voltage of any LiCo cell produced today (that I know of).

4.35v max charge and 3.78v nominal with a 2.75v cutoff.

The Panasonic averages a lower voltage 4.20v with a 2.5v cutoff, but is still a damn good cell.

 

[psychbeat]

so if I left a samsung 30a in a DSD charger trickling for
a few hours would it get to 4.3 eventually or would
the internal resistance be too high?

I know the DSD sucks but it works for me and I always
pull my AWs when the light goes green within a few min
or so.

good stuff!

 

[jasonck08]

so if I left a samsung 30a in a DSD charger trickling for
a few hours would it get to 4.3 eventually or would
the internal resistance be too high?

I know the DSD sucks but it works for me and I always
pull my AWs when the light goes green within a few min
or so.

good stuff!

I was able to charge one of my cells to ~4.3v. I have a really crappy charger designed for a specific brand of protected RCR123's. Basically the charger is constant current constant voltage @ like 4.5v or soemthing crazy. It relies on a protected cells PCB to interrupt the charger from overcharging protected cells. Crazy. :laughing:

Don't know about the DSD, but a while ago I leterally pulled off an unprotected RCR123 @ 4.5v! Watch out for that DSD charger! Take voltage readings frequently!

 

[etc]

The reason the Samsung shines, is it has the highest nominal voltage of any LiCo cell produced today (that I know of).

4.35v max charge and 3.78v nominal with a 2.75v cutoff.

The Panasonic averages a lower voltage 4.20v with a 2.5v cutoff, but is still a damn good cell.

Problem is, you have to get a special, dedicated charger for these Samsung cells. Which likely won't work with other cells like Panasonics, they will be overcharged at 4.35V.

 

[psychbeat]

I know- Im trying to avoid getting another charger
and was hoping the DSD would "overcharge" the
samsungs if I left them chilling in there for a bit.
Im pretty good about only charging batts while Im
in the room with it. I understand that the DSD is "dangerous"
Ive noticed the AW batts I have are pretty good about
cutting off the charger when full. other cells just hangout
with the green light on. not gud I know.

maybe one of these days if Ive got some $ to burn Ill grab a pair of
samsungs on ebay n see now far theyll charge on the DSD n
post back for u guys.

no $ to burn now tho and Ive got plenty of AW 18650s to
hold me over for now.

cheers!

 

[Changchung]

Old thread, but before I open a new one I will like ro ask first, maybe you can help me, I just bought some samsung 3000 batt, can you help me out how to mod some of my charger to make it 4,35v instead 4,20v please? I have some ultrafire, nano, a model that work with a nokia charger and other two bays that is very popular in ebay. Thanks in advantage.

Those are the changer what I had

And a Nano

 

[old4570]

Samsung 30A , the easy thing to do is buy some Sanyo 2600 batteries ... They really discharge well ..

Sorry , dont know either charger , or how to mod , you would need a variable resistor and start some trial and error and a MM ...

I do like my Samsung 30A , its a great battery , but never did get my charger stable @ 4.35v , it needs constant tuning to maintain output voltage @ 4.35v [ PITA ] , easier to buy other performance batteries .