Test / Review: Keeppower 18650 3400mAh (Black)

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HKJ
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Test / Review: Keeppower 18650 3400mAh (Black)

Keeppower 18650 3400mAh (Black)

DSC_2588

Official specifications:

  • 18650 3400mAh Protected Rechargeable Battery
  • Cell: Panasonic NCR18650B 3400mAh
  • Min Capacity: 3250mAh
  • Typical Capacity: 3400mAh
  • Normal Voltage: 3.6V
  • Quality Lithium Ion rechargeable cell
  • In Built Safety Circuitry
  • Protection Circuit (Against overcharge, over discharge, over current and short-circuit.)
  • 4.2 volts max voltage and 3.6 volts nominal voltage


Keeppower%2018650%203400mAh%20(Black)-info

This is the latest cells from Panasonic with the highest capacity.
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_2586
DSC_2589 DSC_2590
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Keeppower%2018650%203400mAh%20(Black)-Capacity

These batteries are good at both low and higher current.

Keeppower%2018650%203400mAh%20(Black)-CapacityTimeHours

Keeppower%2018650%203400mAh%20(Black)-CapacityTime

Keeppower%2018650%203400mAh%20(Black)-Energy

Keeppower%2018650%203400mAh%20(Black)-PowerLoadTime

Keeppower%2018650%203400mAh%20(Black)-TripCurrent

Keeppower%2018650%203400mAh%20(Black)-Charge



Conclusion

This battery has higher capacity and better high current capacity than its predecessor (3100mAh/NCR18650A).
With the added protection from Keeppower it is a very good battery.



Notes and links

Keeppower is a OEM manufacturer, i.e. many of the batteries they produce is sold with other names on them.

The batteries was supplied by Keeppower for review.

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
scaru
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Thanks HKJ! Do you know are those for sale yet? I can't find them on the website. 

HKJ
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scaru wrote:
Thanks HKJ! Do you know are those for sale yet? I can't find them on the website.

Maybe they are waiting until I publish this test Smile

 

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

NightCrawl
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They are for sale if you want to buy 100pcs.. Silly

Great reviews HKJ, I'll give you a cumulative "thank you". Smile

bose301s
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Well, I didn’t think they would be all that much better than the 3100mAh version, I was wrong, they are quite a bit better in absolutely every regard.

Woody
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NightCrawl wrote:

Great reviews HKJ, I’ll give you a cumulative “thank you”. Smile

+1 Thank you HKJ, much appreciated.

SashiX
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Another WOW cell from them Shocked (well, from Panasonic :bigsmile: ) Best 18650 out there?
Thanks for the review, Henrik Wink

sb56637
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Thanks very much for the excellent review! Frontpage’d and Sticky’d.

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ILIKEFLASHLIGHTS
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I was told by a person at Keepower that this battery is just a sample, and that it will be mass produced in about 2 months.

Great review nonetheless.

torchythebatteryboy
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scaru wrote:

Thanks HKJ! Do you know are those for sale yet? I can’t find them on the website. 

Apparently NCR18650B are in short supply just now. I’ve tried a few suppliers.

Yellowhorse
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Am I reading the information right? 11 amp draw before the protection circuit kicks in? If that is right, I will be getting a few of these to replace some of my IMR AW’s. For safety’s sake.

As usual, nice review. Thanks.

HKJ
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Yellowhorse wrote:
Am I reading the information right? 11 amp draw before the protection circuit kicks in? If that is right, I will be getting a few of these to replace some of my IMR AW's. For safety's sake. As usual, nice review. Thanks.

That is correct, but at a continuous load it will probably trip at a lower current (Maybe around 10A).

Running a battery this much above the rated current will also reduce the lifetime significantly.

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

torchythebatteryboy
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HKJ wrote:

Yellowhorse wrote:
Am I reading the information right? 11 amp draw before the protection circuit kicks in? If that is right, I will be getting a few of these to replace some of my IMR AW’s. For safety’s sake. As usual, nice review. Thanks.

That is correct, but at a continuous load it will probably trip at a lower current (Maybe around 10A).

Running a battery this much above the rated current will also reduce the lifetime significantly.

Sounds like faulty pcb, you would be better off with the bare cell.

HKJ
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torchythebatteryboy wrote:
Sounds like faulty pcb, you would be better off with the bare cell.

 

It is not a faulty PCB, but it probably has 3 transistors. Many 2900/3100mAh batteries has the current limit at around 11A.

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

agedbriar
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Kudos for the Battery Comparator, HKJ !

wesco
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Hey I know these are only available in large quantities I.E. 100 pieces. I don’t have any need for that many batteries… yet Sad

I’ve made an inquiry as to price for 100 pieces.

My question to y’all is if I make a purchase of these batteries direct from source at 100 pieces would anybody be interested in buying excess batteries off of me. I don’t yet know what the cost is seing as I just sent the inquiry 5 minutes ago. But I will keep y’all posted.

Chicago X
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Due to the limited availability, I would opine that you would have little difficulty getting rid of them – at a reasonable price, of course.

http://wardogsmakingithome.org/index.html

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Yellowhorse
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Depending on the price – yes.

wesco
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Chicago X wrote:
Due to the limited availability, I would opine that you would have little difficulty getting rid of them – at a reasonable price, of course.

Well it looks like I can pick up 50 or 100 pieces and sell what I’m not going to use at about 8.50 a piece plus S&H and make a small amount back in my pocket. If enough of y’all are interested ill buy some and share the love with this new incredobat. PM me if you think you’d like to buy some pending a purchase from keeppower.

monanoke
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For that price I’d be in for 4 or maybe more. Smile

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Yellowhorse
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I’m in for 4 of them.

wesco
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Lol I figure that’s a lot cheaper than than you can buy lesser quality batteries. We’ll see how bad they are going to stick me for shipping. That price has some shipping from them built in. It might go up a little if they hit me hard for shipping. :~

JaredM
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I plan to purchase 3-5 depending on finalized pricing :bigsmile:

wesco
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JaredM wrote:
I plan to purchase 3-5 depending on finalized pricing :bigsmile:

thread 1
thred 2
those are both active on this topic they should cover the info on price per unit and cost of shipping by location.

Let me know if you have any more questions. Smile

raccoon city
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Welcome to the madness, JaredM!

Best0270

JaredM

Price
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HKJ,

Are these on the market yet?

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HKJ
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Price wrote:
HKJ, Are these on the market yet?

I believe that only a small batch was released onto the market. Keeppower got some of these and send a couple of them to me for test.

When next batch is released is an open question.

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

Price
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Thank you HKJ!

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Jell
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HKJ wrote:

not all lights will be able to use the full capacity.


Hi HKJ, I don’t understand, what does this mean? Sorry I’m a newbie.
HKJ
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Jell wrote:
HKJ wrote:

not all lights will be able to use the full capacity.

Hi HKJ, I don't understand, what does this mean? Sorry I'm a newbie.

 

Lights needs some voltage to function and many lights will reduce brightness or even turn off, before the battery is down to 2.5 volt.

Here is an example from one of my reviews:

The light needs 4 volt to get full brightness, when the battery voltage is down to 3 volt you will only get about 30% of full brightness.

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

Jell
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I think I get what you mean now. Thanks a lot. Smile

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