Test / Review: NCR18650A protected (Green)

21 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 1 hour 45 min ago
Joined: 05/24/2011 - 12:23
Posts: 7196
Location: Copenhagen, Denmark
Test / Review: NCR18650A protected (Green)

NCR18650A protected (Green)

DSC_2099

Official specifications:

  • Genuine Panasonic 18650 batteries
  • Capacity: 3100mAh
  • With protection board
  • Protective case included
  • Comes as a pair


NCR18650A%20protected%20(Green)-info

These batteries are not from Panasonic, they are made by an unknown manufacturer that buys Panasonic cells and then add protection!
The cell used can be discharged down to 2.5 volt, in my test I only discharges to 2.8 volt, i.e. I do not measure the full capacity. But then, not all lights will be able to use the full capacity.

DSC_2096 DSC_2098

DSC_2100 DSC_2101

DSC_2102
DSC_2103

NCR18650A%20protected%20(Green)-Capacity

These batteries shows very good performance.

NCR18650A%20protected%20(Green)-CapacityTimeHours

NCR18650A%20protected%20(Green)-CapacityTime

NCR18650A%20protected%20(Green)-Energy

NCR18650A%20protected%20(Green)-PowerLoadTime

NCR18650A%20protected%20(Green)-TripCurrent

The protection circuit trips at a value that will protect the battery from being mistreated.

NCR18650A%20protected%20(Green)-Charge



Conclusion

This battery uses a good cell, this secures many things:

  • The batteries does match in capacity, i.e. they can be used in series.
  • The battery is very safe.
  • The battery has the specified capacity (But only when tested at the specified conditions).



All in all a very good battery.

I have to add a warning to this conclusion: Somebody might see an opportunity to earn more money, i.e. take a cheap cell and add a fake Panasonic wrapper. I expect this will happen!



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
fishinfool
fishinfool's picture
Offline
Last seen: 8 months 1 week ago
Joined: 03/09/2010 - 00:30
Posts: 4342
Location: Hilo, Hawaii

Thanks again HKJ!

 

Don wrote:

"But as I said long ago, you are more likely to be killed by a dead fish dropped by a seagull in the Sahara Desert than by a lithium ion

Pulsar13
Pulsar13's picture
Offline
Last seen: 11 months 2 weeks ago
Joined: 02/05/2012 - 10:23
Posts: 1909
Location: Malaysia

HKJ wrote:

All in all a very good battery.

I have to add a warning to this conclusion: Somebody might see an opportunity to earn more money, i.e. take a cheap cell and add a fake Panasonic wrapper. I expect this will happen!

Thanks HKJ.

Unfortunately, like you said, we're quite likely to see fakes soon. Which is why I hoard Panasonics right away before they are more popular. Later, they might just be like TF / UF right now, very hard to find genuine ones.

And with gleaming reviews like this all over BLF and elsewhere, I'd expect this won't take too long. 

sb56637
sb56637's picture
Offline
Last seen: 8 hours 21 min ago
Joined: 01/08/2010 - 09:29
Posts: 6689
Location: The Light

Thanks a lot for another detailed review! Frontpage’d and Sticky’d.

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

Langcjl
Langcjl's picture
Offline
Last seen: 2 years 12 hours ago
Joined: 03/05/2011 - 05:36
Posts: 2162
Location: Wisconsin USA

Thanks for the effort HKJ.

Piers said " ....but who wants enough light, when you have the option for far too much "

Lothar
Lothar's picture
Offline
Last seen: 2 hours 38 min ago
Joined: 10/26/2011 - 11:22
Posts: 529
Location: Stellenbosch, South Africa

Current Collection:

BLF: BLF-GT90, BLF-GT70 (CW Sliced), BLF GTmini, BLF-LT1; 

BTU: Shocker (3 x SST-40 @ 8A)

Solarforce: L2P (XM-L2 U3 @ 4A), MPP-1 (XP-L HI @ 6A), MPP-3 (3 x XM-L2 U2 @ 12A), M6 (Nichia 319A @ 6A), M8 (XHP-50.2 @ 9A), 9x (9 x XM-L2 U2 @ 2A)

Coming Soon: Lumintop: BLF-GT4; 

hank
hank's picture
Offline
Last seen: 5 hours 39 min ago
Joined: 09/04/2011 - 21:52
Posts: 8767
Location: Berkeley, California

So the green ones are not “dual protection” — what’s the difference?

HKJ
HKJ's picture
Offline
Last seen: 1 hour 45 min ago
Joined: 05/24/2011 - 12:23
Posts: 7196
Location: Copenhagen, Denmark

Lothar wrote:
Are these the same cells: "http://www.ebay.com/itm/NEW-2X-Panasonic-18650-3-6V-3100mAh-Rechargeable...":http://www.ebay.com/itm/NEW-2X-Panasonic-18650-3-6V-3100mAh-Rechargeable...

No, the tested batteries are with pcb protection, your link is without pcb protection.

 

hank wrote:
So the green ones are not "dual protection" -- what's the difference?

It would be correct enough to say dual protection about the tested batteries.

The cell has some safety build in and it also had the pcb protection.

 

 

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

ILIKEFLASHLIGHTS
ILIKEFLASHLIGHTS's picture
Offline
Last seen: 1 year 7 months ago
Joined: 08/04/2011 - 23:47
Posts: 5693
Location: southeast MO

Nice review. So how much are these batteries and where can you purchase them? Where did you get the ones you tested from?

ILIKEFLASHLIGHTS
ILIKEFLASHLIGHTS's picture
Offline
Last seen: 1 year 7 months ago
Joined: 08/04/2011 - 23:47
Posts: 5693
Location: southeast MO

Ok I see Deal Xtreme listed.

kaabob
Offline
Last seen: 2 years 6 months ago
Joined: 05/18/2012 - 19:21
Posts: 32
Pulsar13 wrote:

HKJ wrote:

All in all a very good battery.

I have to add a warning to this conclusion: Somebody might see an opportunity to earn more money, i.e. take a cheap cell and add a fake Panasonic wrapper. I expect this will happen!

Thanks HKJ.

Unfortunately, like you said, we’re quite likely to see fakes soon. Which is why I hoard Panasonics right away before they are more popular. Later, they might just be like TF / UF right now, very hard to find genuine ones.

And with gleaming reviews like this all over BLF and elsewhere, I’d expect this won’t take too long. 

Sigh, so true.

By then Imma hop on the LG 4.35v bandwagon before that falls to the fate of the fakers too!

Rozen
Offline
Last seen: 5 years 2 months ago
Joined: 05/04/2012 - 00:55
Posts: 107
Location: United States
Pulsar13 wrote:

HKJ wrote:

All in all a very good battery.

I have to add a warning to this conclusion: Somebody might see an opportunity to earn more money, i.e. take a cheap cell and add a fake Panasonic wrapper. I expect this will happen!

Thanks HKJ.

Unfortunately, like you said, we’re quite likely to see fakes soon. Which is why I hoard Panasonics right away before they are more popular. Later, they might just be like TF / UF right now, very hard to find genuine ones.

And with gleaming reviews like this all over BLF and elsewhere, I’d expect this won’t take too long. 

Would it be safe to say that the current ones for sale are all genuine? I guess I should start stocking up as well.

I found these on ebay. Would you guys say that it is a safe bet to buy these?

Ecig
Offline
Last seen: 7 years 4 months ago
Joined: 04/28/2012 - 22:37
Posts: 807
Location: Switzerland

Adn what about those NCRs with very popular prices on buyincoins?

HKJ
HKJ's picture
Offline
Last seen: 1 hour 45 min ago
Joined: 05/24/2011 - 12:23
Posts: 7196
Location: Copenhagen, Denmark

Rozen][quote=Pulsar13 wrote:

Would it be safe to say that the current ones for sale are all genuine? I guess I should start stocking up as well. I found "these":http://www.ebay.com/itm/New-Panasonic-18650-NCR18650-Rechargeable-Batter... on ebay. Would you guys say that it is a safe bet to buy these?

If the price is much below $10 I would not expect them to be genuine, at or above $10 they might be genuine

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

ChangchungLeds
ChangchungLeds's picture
Offline
Last seen: 2 months 1 day ago
Joined: 09/20/2011 - 20:18
Posts: 300
Location: Venezuela

Sorry… Wrong post

Zebralight Spark Princeton Inova Petzl Maglite Bushnell a lot of Cree XM-L Lights 18650's Intl-outdoor 3400 Panasonic 3100 Hobby Charger

kreisler
kreisler's picture
Offline
Last seen: 6 years 3 months ago
Joined: 11/12/2011 - 23:32
Posts: 3992
Location: Deutcheland

A fully charged cell, 4.200V resting voltage, has 3000mAh measured capacity at -0.2A discharge rate.

How much capacity does the cell have, starting off 4.100V resting voltage? Smile

Any tests, measurements or estimations?

*FMI* i got 4 i/o sh
HKJ
HKJ's picture
Offline
Last seen: 1 hour 45 min ago
Joined: 05/24/2011 - 12:23
Posts: 7196
Location: Copenhagen, Denmark

kreisler wrote:

A fully charged cell, 4.200V resting voltage, has 3000mAh measured capacity at -0.2A discharge rate.

You mean a slightly overcharged cell!

kreisler wrote:
How much capacity does the cell have, starting off 4.100V resting voltage? Smile

Any tests, measurements or estimations?

 

I did test a bit on this before I started my battery test, but it was also before my test stations was finished, i.e. precision is slightly lower.

I do hope to return to these tests and do a couple of different LiIon batteries, but as long as I have lots of batteries for the battery test, it will have to wait.

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

kreisler
kreisler's picture
Offline
Last seen: 6 years 3 months ago
Joined: 11/12/2011 - 23:32
Posts: 3992
Location: Deutcheland

HKJ wrote:
I did test a bit on this before I started my battery test, but it was

i think that's exactly what i was talking about: the discharge capacity of a li-ion cell starting off a resting voltage other than the (slightly overcharged but "standard") 4.20V.

so from the table i am gathering that the AW cell (-0.1A, 4.10V) contains only 89% of the max possible capacity (-0.1A, 4.20V, 2336mAh), namely 2072mAh.

reason why i am curious, it happens that the integrated flashlight charger of one of my flashlights only charges the cells to 4.103V, while i was expecting 4.15V or higher. poor charging circuit in my flashlight!!

well this reminds of a night club where i order a 0.2L glass of cold coke but the tender serves a half-a**ed glass with maybe 0.17L in it hehe. gotta hate that club!! Wink

Thanks HKJ as always! Smile

*FMI* i got 4 i/o sh
HKJ
HKJ's picture
Offline
Last seen: 1 hour 45 min ago
Joined: 05/24/2011 - 12:23
Posts: 7196
Location: Copenhagen, Denmark

kreisler wrote:

so from the table i am gathering that the AW cell (-0.1A, 4.10V) contains only 89% of the max possible capacity (-0.1A, 4.20V, 2336mAh), namely 2072mAh

When are you measuring the voltage?

The table contains 3 voltage values.

1) Charger voltage

2) After 10 seconds

3) After 60 minutes

 

Your value is probably a 10 second or a 60 minute value.

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

kreisler
kreisler's picture
Offline
Last seen: 6 years 3 months ago
Joined: 11/12/2011 - 23:32
Posts: 3992
Location: Deutcheland

HKJ wrote:
Your value is probably a 10 second or a 60 minute value.

Good point. When the flashlight signals "charging done!", i take out the HQ cells (18650 Panasonic) and measure their voltage (i.e. after 10 seconds). UT61E would show a 4.104V offline reading. Since these are HQ cells, the self-discharge rate, offline, is super low. After 60 minutes UT61E would still return ~4.10V, so no big difference/self-discharge/loss of capacity.

*FMI* i got 4 i/o sh
MrSensiBull
MrSensiBull's picture
Offline
Last seen: 4 years 6 months ago
Joined: 10/06/2015 - 14:31
Posts: 1
Location: Canada

Thank you SO much for this review. I have been looking all over the net for a decent one that was clear with the information!

If you must believe, believe in humanity. Together we accomplish greatness!