Test / Review: Panasonic NCR18650B Protected 3400mAh (Green)

80 posts / 0 new
Last post

Pages

HKJ
HKJ's picture
Offline
Last seen: 23 min 15 sec ago
Joined: 05/24/2011 - 12:23
Posts: 7022
Location: Copenhagen, Denmark
Test / Review: Panasonic NCR18650B Protected 3400mAh (Green)

Panasonic NCR18650B Protected 3400mAh (Green)

DSC_1075

Official specifications:

  • Original Panasonic (Industrial) products, Made in Japan
  • Capacity: 3400mAh (Min 3250mAh)
  • Charging volt: 4.2v
  • Max charge current 0.7C 2A
  • Recommend discharge current 1C 2.9A
  • Discharge Termination Voltage: 2.5V
  • Protection kicks in : 2.75v and 4.2v
  • Over-Charging / Draining at 4.2v / 2.75v
  • Protection Circuit installed
  • Weight : 47g
  • Size 18.50mm x 70.5mm (Larger than non-protected)
  • The voltage of full charge & empty condition is 4.2v & 2.75v respectively


The above specifications is from the dealers website and there is a few errors in it!

Panasonic%20NCR18650B%20Protected%203400mAh%20(Green)-info

This battery is not made by Panasonic. The cell inside the battery is from Panasonic, the protection cirucit and the assembly work is done by somebody else.
Notice the length of the battery, it is the longest 18650 I have seen to date.

DSC_1073 DSC_1074

DSC_1076 DSC_1077

DSC_1078

DSC_1079

Panasonic%20NCR18650B%20Protected%203400mAh%20(Green)-Capacity

The capacity looks very good as expected for a Panasonic 3400 mAh battery.

Panasonic%20NCR18650B%20Protected%203400mAh%20(Green)-CapacityTimeHours

Panasonic%20NCR18650B%20Protected%203400mAh%20(Green)-CapacityTime

Panasonic%20NCR18650B%20Protected%203400mAh%20(Green)-Energy

Panasonic%20NCR18650B%20Protected%203400mAh%20(Green)-PowerLoadTime

Panasonic%20NCR18650B%20Protected%203400mAh%20(Green)-TripCurrent

The protection at 6.5A makes it very difficult to overload these batteries, but is high enough for any normal use.

Panasonic%20NCR18650B%20Protected%203400mAh%20(Green)-Charge



Conclusion

This is a very good battery, except for the length. Only buy it if you know you equipment can use a very long battery!



Notes and links

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Edited by: sb56637 on 08/26/2014 - 17:45
PierCC
Offline
Last seen: 5 years 4 months ago
Joined: 09/08/2011 - 15:26
Posts: 80
Location: Italy

thank you very much, as always, for these very useful information

kreisler
kreisler's picture
Offline
Last seen: 5 years 11 months ago
Joined: 11/12/2011 - 23:32
Posts: 3992
Location: Deutcheland

Thanks you very much!!

There are many products of Protected NCR18650B on the market! How many do we know? Enerdan, KeepPower, Eagletac, XTAR, Efest, ..

*FMI* i got 4 i/o sh
HKJ
HKJ's picture
Offline
Last seen: 23 min 15 sec ago
Joined: 05/24/2011 - 12:23
Posts: 7022
Location: Copenhagen, Denmark

kreisler wrote:
There are many products of Protected NCR18650B on the market! How many do we know? Enerdan, KeepPower, Eagletac, XTAR, Efest, ..

Yes, but they are not sold with that name on them and there is also small differences between the batteries.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

1div0
1div0's picture
Offline
Last seen: 6 years 7 months ago
Joined: 12/26/2011 - 04:30
Posts: 27

Thank you for conducting your tests and sharing your findings.  Smile

NightCrawl
Offline
Last seen: 3 years 8 months ago
Joined: 01/22/2012 - 08:20
Posts: 3071
Location: Karlsruhe, Germany

I just compared some of the -B cells in HKJs comparator and it seems that - so far - the AmpMax and Keeppower perform best. Probably both made by Keeppower. Just like the one from Intl-Outdoor, but it doesnt perform as good. I wonder why that is..


Oh, and do you have a bare -PD cell up for tests?

HKJ
HKJ's picture
Offline
Last seen: 23 min 15 sec ago
Joined: 05/24/2011 - 12:23
Posts: 7022
Location: Copenhagen, Denmark

NightCrawl wrote:

I just compared some of the -B cells in HKJs comparator and it seems that - so far - the AmpMax and Keeppower perform best. Probably both made by Keeppower. Just like the one from Intl-Outdoor, but it doesnt perform as good. I wonder why that is..

Me too, I do not get the same result.

Generally there are two differences:

Capacity, this can be due to age of the cell. I.e. do I get a fresh battery and test it immediately when I receive it, or is it a couple of month old before it is tested.

Voltage at high load, this often depends on the protection circuit. I.e. a 12A protection will often have higher output voltage than a 5A protection.

There can also be production tolerances between different batches of cells.


NightCrawl wrote:
Oh, and do you have a bare -PD cell up for tests?

No, but I expect to receive another protected one and will probably test it up to 10A.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

NightCrawl
Offline
Last seen: 3 years 8 months ago
Joined: 01/22/2012 - 08:20
Posts: 3071
Location: Karlsruhe, Germany

Or Keeppower saves the premium circuit for the premium brands and the little less (but still very) good ones for budget brands like IO.

 

I guess you are gonna receive the one from IO? A comparison with the unprotected one would be really cool though.

HKJ
HKJ's picture
Offline
Last seen: 23 min 15 sec ago
Joined: 05/24/2011 - 12:23
Posts: 7022
Location: Copenhagen, Denmark

NightCrawl wrote:

Or Keeppower saves the premium circuit for the premium brands and the little less (but still very) good ones for budget brands like IO.

 

That theory does not fit.

I will call the performance of these two batteries virtual identical.

The lowest trace (i.e. the 5A) is the best to see differences in protection.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

NightCrawl
Offline
Last seen: 3 years 8 months ago
Joined: 01/22/2012 - 08:20
Posts: 3071
Location: Karlsruhe, Germany

Yes, the 5A trace is different but the capacity is the same. So that would be a different PCB. Why doesnt my theory fit then?

HKJ
HKJ's picture
Offline
Last seen: 23 min 15 sec ago
Joined: 05/24/2011 - 12:23
Posts: 7022
Location: Copenhagen, Denmark

NightCrawl wrote:

Yes, the 5A trace is different but the capacity is the same. So that would be a different PCB. Why doesnt my theory fit then?

The 5A track is the same for the two batteries, except at the start and that has nothing to do with the protection.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

NightCrawl
Offline
Last seen: 3 years 8 months ago
Joined: 01/22/2012 - 08:20
Posts: 3071
Location: Karlsruhe, Germany

Okay. So there is a difference in the cell?

HKJ
HKJ's picture
Offline
Last seen: 23 min 15 sec ago
Joined: 05/24/2011 - 12:23
Posts: 7022
Location: Copenhagen, Denmark

NightCrawl wrote:
Okay. So there is a difference in the cell?

That dip at the start might be due to temperature (The cell need to heat up a bit, to get full performance), my testing lab does not have a tightly controlled temperature, it will vary a few degrees.

 

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

NightCrawl
Offline
Last seen: 3 years 8 months ago
Joined: 01/22/2012 - 08:20
Posts: 3071
Location: Karlsruhe, Germany

Thats plausible. Thanks for enlightening me. Smile

jpil
Offline
Last seen: 3 weeks 21 hours ago
Joined: 08/03/2012 - 09:27
Posts: 969
Location: Greece

Thank you for conducting your tests and sharing your findings.

sb56637
sb56637's picture
Offline
Last seen: 5 hours 11 min ago
Joined: 01/08/2010 - 09:29
Posts: 6560
Location: The Light

Thanks very much! Frontpage’d and Sticky’d.

Budget Light Forum ...where Frugal meets with Flashlight!

Rusty Joe
Rusty Joe's picture
Offline
Last seen: 1 month 1 week ago
Joined: 07/24/2011 - 00:22
Posts: 3009
Location: San Antonio, TX

Where can I get these batteries??

Eat Once a Day - Lose Weight - Feel Great!

www.omad.info

ri chevy
Offline
Last seen: 2 months 1 day ago
Joined: 11/26/2011 - 20:50
Posts: 782
Location: Ocean State

HKJ posted in his graph.

HKEquipment Wink

luvlites
Offline
Last seen: 5 years 3 months ago
Joined: 02/29/2012 - 16:55
Posts: 354

HKJ wrote:

This is a very good battery, except for the length. Only buy it if you know you equipment can use a very long battery!


HKJ, will these fit in the TN30 & TN31? Thanks.
Rusty Joe
Rusty Joe's picture
Offline
Last seen: 1 month 1 week ago
Joined: 07/24/2011 - 00:22
Posts: 3009
Location: San Antonio, TX

Any known fav lights that these positively won’t fit in? I know Hi-Max’s won’t fit in 501Bs, but I’ve not seen too many batteries that are so big that they don’t work in most lights.

Eat Once a Day - Lose Weight - Feel Great!

www.omad.info

HKJ
HKJ's picture
Offline
Last seen: 23 min 15 sec ago
Joined: 05/24/2011 - 12:23
Posts: 7022
Location: Copenhagen, Denmark

luvlites wrote:
HKJ wrote:

This is a very good battery, except for the length. Only buy it if you know you equipment can use a very long battery!

HKJ, will these fit in the TN30 & TN31? Thanks.

 

The diameter is to large, but they do fit in length.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

HKJ
HKJ's picture
Offline
Last seen: 23 min 15 sec ago
Joined: 05/24/2011 - 12:23
Posts: 7022
Location: Copenhagen, Denmark

Rusty Joe wrote:
Any known fav lights that these positively won't fit in? I know Hi-Max's won't fit in 501Bs, but I've not seen too many batteries that are so big that they don't work in most lights.

I would expect there are many light, but I have not tested.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

jpil
Offline
Last seen: 3 weeks 21 hours ago
Joined: 08/03/2012 - 09:27
Posts: 969
Location: Greece
Rusty Joe wrote:
Where can I get these batteries??

http://www.fasttech.com/products/0/10001980/1141104-panasonic-ncr18650b-...

Sirius9
Sirius9's picture
Offline
Last seen: 10 hours 46 min ago
Joined: 03/04/2012 - 19:23
Posts: 4591
Location: South Europe

jpil wrote:
Rusty Joe wrote:
Where can I get these batteries??
http://www.fasttech.com/products/0/10001980/1141104-panasonic-ncr18650b-...

Distributor On CNY Holiday Frown

 

skyrider1
Offline
Last seen: 5 months 2 weeks ago
Joined: 11/18/2012 - 21:54
Posts: 762
Location: USA

I think fasttech has them in stock though. I ordered a set a week and half ago and just got them. Got another set coming in.

light junkie
light junkie's picture
Offline
Last seen: 4 months 4 weeks ago
Joined: 02/03/2013 - 23:36
Posts: 1693
Location: Sw Az
jpil wrote:
Rusty Joe wrote:
Where can I get these batteries??

http://www.fasttech.com/products/0/10001980/1141104-panasonic-ncr18650b-...

Again. I. Advance I apologize but if I had to pick between the keeppower black 3400 maH protected or these Panasonic 3400 maH protected which is a better performer?

Lj

Toph
Offline
Last seen: 6 years 2 weeks ago
Joined: 01/17/2013 - 22:46
Posts: 211
Location: Australia

luvlites wrote:
HKJ wrote:

This is a very good battery, except for the length. Only buy it if you know you equipment can use a very long battery!


HKJ, will these fit in the TN30 & TN31? Thanks.

I have these Batteries, they are a tight fit, but they fit both the TN30 and TN31.

Damn Addictions

Shadowww
Offline
Last seen: 10 hours 2 min ago
Joined: 01/20/2012 - 19:09
Posts: 1340
Location: Northern Europe

light junkie wrote:
Again. I. Advance I apologize but if I had to pick between the keeppower black 3400 maH protected or these Panasonic 3400 maH protected which is a better performer?

Keeppower, without a doubt
sorotantaz
sorotantaz's picture
Offline
Last seen: 7 months 2 weeks ago
Joined: 04/06/2013 - 05:04
Posts: 730

Shadowww wrote:
light junkie wrote:
Again. I. Advance I apologize but if I had to pick between the keeppower black 3400 maH protected or these Panasonic 3400 maH protected which is a better performer?
Keeppower, without a doubt !http://qs.lc/p/wn2.png![/quote]

i thought keeppower also use panasonic cell.

so the protection circuit does the difference?

 

 

 

 

Shadowww
Offline
Last seen: 10 hours 2 min ago
Joined: 01/20/2012 - 19:09
Posts: 1340
Location: Northern Europe

sorotantaz wrote:

so the protection circuit does the difference?


Yup. Better PCB has lower internal resistance, and therefore less voltage drop.
Hikelite
Offline
Last seen: 10 hours 49 min ago
Joined: 07/13/2011 - 16:18
Posts: 3639
Location: RO

Shadowww wrote:
sorotantaz wrote:

so the protection circuit does the difference?

Yup. Better PCB has lower internal resistance, and therefore less voltage drop.

I guess the clear PVC concept pays off.

Pages