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Old 09-05-2011, 07:06 AM #1
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Default Panasonic NCR18650A 3100mAh!

G'day

Saw these the other day,

2x Panasonic NCR 18650 A 3100mAh Lithium Li-Ion battery | eBay




they claim 3100mAh typical and 2950mAh minimum!

Some testing will have to be done on these puppies!


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Old 09-06-2011, 05:42 AM #2
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Default Re: Panasonic NCR18650A 3100mAh!

That is quite unbelievable. I have never seen batteries of such quality except AWs from lighthound. The only problem is the site... ebay...

The graph looks interesting. But at ~12$ a cell? kinda pricey... Id rather go for some 2.5Ah cells.
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Old 09-06-2011, 05:44 AM #3
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Default Re: Panasonic NCR18650A 3100mAh!

i ordered a few will see how they go.
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Old 09-06-2011, 07:19 PM #4
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Default Re: Panasonic NCR18650A 3100mAh!

I think these batteries have been out for a while now. IIRC, Readilast and AW use Panasonic NCR 18650s in their 2900 mAh versions. They have very good discharge/capacity rates.
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Old 09-06-2011, 11:49 PM #5
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Default Re: Panasonic NCR18650A 3100mAh!

Ordering 4 now !!
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Old 09-07-2011, 01:03 AM #6
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Default Re: Panasonic NCR18650A 3100mAh!

I'm getting my batts from laptop packs they do just fine


just separate them :P
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Old 09-07-2011, 03:21 AM #7
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Default Re: Panasonic NCR18650A 3100mAh!

Quote:
Originally Posted by Jufran88 View Post
I think these batteries have been out for a while now. IIRC, Readilast and AW use Panasonic NCR 18650s in their 2900 mAh versions. They have very good discharge/capacity rates.
yeah the NCR18650s are old, the NCR18650A's are new.
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Old 09-07-2011, 05:50 AM #8
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Default Re: Panasonic NCR18650A 3100mAh!

Panasonic Starts Mass-Production of High-Capacity 3.1 Ah Lithium-ion Battery | Headquarters News | Panasonic Global

They started producing them around December 2009 and selling them around Feb 2010. There are only a few distributors that are selling the new ones. You can tell by the different wrapper they use.
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Old 09-07-2011, 06:04 AM #9
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Default Re: Panasonic NCR18650A 3100mAh!

At $14.00 each that is a good deal if they really can pack in a full 2950mAh

Someone make a report on these when they get them...
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Old 09-07-2011, 06:05 AM #10
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Default Re: Panasonic NCR18650A 3100mAh!

got 9 of them today
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Old 09-07-2011, 06:19 AM #11
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Default Re: Panasonic NCR18650A 3100mAh!

Quote:
Originally Posted by Flaminpyro View Post
At $14.00 each that is a good deal if they really can pack in a full 2950mAh

Someone make a report on these when they get them...
Yah! I would be interested, but even more so, if I could get them a bit lower in price...? -GH
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Old 09-07-2011, 06:24 AM #12
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Default Re: Panasonic NCR18650A 3100mAh!

I wonder if those distributors on alibaba are a good source?
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Old 09-07-2011, 06:27 AM #13
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Default Re: Panasonic NCR18650A 3100mAh!

this seller on ebay is awesome, i got fast postage and a FREE BATTERY!
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Old 09-07-2011, 12:07 PM #14
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Default Re: Panasonic NCR18650A 3100mAh!

My tests on the different 18650's i carry.

These where all fully charged straight off the charger.

Using a 3W 5ohm ceramic resistor.


Panasonic NCR18650A 3100mAh

V1=4.137 VDC No Load
V2=3.987 VDC Loaded
R = 5.2 ohms
Internal resistance : 203 mOhms @ 0.76A


Sanyo 2600mAh

V1=4.155 VDC No Load
V2=4.030 VDC Loaded
R = 5.2 ohms
Internal resistance : 161 mOhms @ 0.77A

Panasonic NCR18650 2900mAh

V1=4.133 VDC No Load
V2=3.985 VDC Loaded
R = 5.2 ohms
Internal resistance : 193 mOhms @ 0.76A

Ultrafire "4000"mAh (Closer to 1600mAh)

V1=4.143 VDC No Load
V2=3.995 VDC Loaded
R = 5.2 ohms
Internal resistance : 192 mOhms @ 0.76A


According to Battery Testing Experts

75-150 mOhm - Excellent
150-250 mOhm - Good
250-350 mOhm - Marginal
350-Up mOhm - Bad
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RGB - 400mW (1)

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Last edited by Fiddy; 09-07-2011 at 12:28 PM.
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Old 09-07-2011, 03:47 PM #15
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Default Re: Panasonic NCR18650A 3100mAh!

sanyo is good at making low iR cells, but this is the first 3100mAh cell I've seen that doesn't require you to charge to 4.35V. They say that they discharged down to 2.5V for the capacity test, but it's still pretty impressive.

edit: here's an old datasheet: http://industrial.panasonic.com/www-...A4000CE254.pdf

Last edited by BShanahan14rulz; 09-07-2011 at 03:50 PM.
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Old 09-07-2011, 04:18 PM #16
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Default Re: Panasonic NCR18650A 3100mAh!

Quote:
Originally Posted by jimdt7 View Post
Ordering 4 now !!
Not Available to Greece
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