Test / Review: Keeppower 18650 3400mAh (Black)

Batteries and Chargers Rechargeable Batteries
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Keeppower 18650 3400mAh (Black)



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




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.








These batteries are good at both low and higher current.















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

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

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Maybe they are waiting until I publish this test

4

They are for sale if you want to buy 100pcs.. :P

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

5

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.

6

+1 Thank you HKJ, much appreciated.

7

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

8

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

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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.

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

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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.

12

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.

13

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

14

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

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Kudos for the Battery Comparator, HKJ !

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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 :frowning:

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.

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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.

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Depending on the price - yes.

19

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.

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For that price I’d be in for 4 or maybe more. :slight_smile: