Test/Review of Keeppower 26650 5200mAh (Black) 2014

[size=+3]Keeppower 26650 5200mAh (Black) 2014[/size]


Official specifications:

• KeepPower 26650 3.6V/3.7V 5200mAh Li-ion Rechargeable Battery
• Min Capacity: 5100mAh
• Typical Capacity: 5200mAh
• Normal Voltage: 3.7V
• Quality Lithium Ion rechargeable cell
• Maximum Capacity and Reliability
• 4.2 volts max voltage and 3.6-3.7 volts nominal voltage

26650 batteries are getting higher capacity, this cell sets the record for capacity.










The two cells has very good tracking and capacity does not vary much up to 5A load.











Protection trips at around 9.5A.





[size=+3]Conclusion[/size]

Very good capacity and good performance for a high capacity 26650 battery.



[size=+3]Notes and links[/size]

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
Compare to other 26650 batteries

Thanks a lot for your excellent review. HKJ! :thumbsup:
The cell has high capacity & good performance as you said.

So I take it that, protection aside, these are completely different cells from the Keeppower IMR 26650 cells with the same 5200mAH capacity.

that's amazing

tobrien said:

that's amazing

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I don't have these cells, but the 5200 IMRs. However, it's pretty amazing all the same. It looks like 26650s are finally starting to get some REAL capacity. I wonder if 26650 lights will become more popular now that you can truly no longer say that 26650s don't have enough more capacity than 18650s to be worthwhile.

StorminMatt said:

So I take it that, protection aside, these are completely different cells from the Keeppower IMR 26650 cells with the same 5200mAH capacity.

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I am going to test the IMR26650 5200mAh soon.

HKJ said:

I am going to test the IMR26650 5200mAh soon.

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It kind of makes me wonder why Keeppower would bother with an ICR when they have an IMR of the same capacity. Or why the ICR doesn't have a larger capacity than the IMR.

StorminMatt said:

It kind of makes me wonder why Keeppower would bother with an ICR when they have an IMR of the same capacity. Or why the ICR doesn't have a larger capacity than the IMR.

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For most application I would prefer the protected version.

Is this a preview? They aren't on Keeppower's website yet.

Looks quite appealing. Thanks for the review.

I'm not sure where this battery is available. But I got my IMRs at Illumination Supply.

Hoop said:

Is this a preview? They aren't on Keeppower's website yet.

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Keeppower sent them to me about a month ago, they did not give me any information about when they are going to sell them.
Try asking some Keeppower dealers.

I'm still amazed that it says 5200 mAh and it really is!! that's phenomenal

tobrien said:

I'm still amazed that it says 5200 mAh and it really is!! that's phenomenal

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The same is true of the IMRs.

Nice review, HKJ. This is great to see more improvements in the 26650 cells. My desire is to see more 1x26650 lights on the market. It really is too bad that there are not very many options yet. Hopefully, there will be more 1x26650 lights in the future when manufacturers realize that these cells have a noticeable capacity advantage.

StorminMatt said:

The same is true of the IMRs.

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are you referring to Keeppower IMRs specifically?

Hoop said:

Is this a preview? They aren't on Keeppower's website yet.

Looks quite appealing. Thanks for the review.

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RTDVapor has em now it looks like.

Mr. Tone said:

Nice review, HKJ. This is great to see more improvements in the 26650 cells. My desire is to see more 1x26650 lights on the market. It really is too bad that there are not very many options yet. Hopefully, there will be more 1x26650 lights in the future when manufacturers realize that these cells have a noticeable capacity advantage.

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I think you very well could see some new 1x26650 lights in the future as a result if higher capacity 26650s. For WAYYYY too long, it was just too easy for people to say that 26650s have too little of an advantage over 18650s. But with these cells, that's no longer the case. And 1x26650 lights are just alot easier to live with than multi-18650 lights. For now, probably the best 1x26650 lights are the Foursevens Maelstrom lights (MMU-X and MMU-X3). Both are worth looking into.

tobrien said:

are you referring to Keeppower IMRs specifically?

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Yes.

tobrien said:

RTDVapor has em now it looks like.

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Does not appear that way. Perhaps you are mistaken?

Hoop said:

Does not appear that way. Perhaps you are mistaken?

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this is it right? http://www.rtdvapor.com/keeppower-imr-26650-5200mah-20amp/

StorminMatt said:

I think you very well could see some new 1x26650 lights in the future as a result if higher capacity 26650s. For WAYYYY too long, it was just too easy for people to say that 26650s have too little of an advantage over 18650s. But with these cells, that's no longer the case. And 1x26650 lights are just alot easier to live with than multi-18650 lights. For now, probably the best 1x26650 lights are the Foursevens Maelstrom lights (MMU-X and MMU-X3). Both are worth looking into.

Click to expand...

Thanks for the suggestion and I have looked at those 4sevens lights in the past. For me, the UI is undesirable and also I just can't do cool white tints anymore. I have not purchased a 4sevens light since they stopped making neutral white models quite a while back. I really like Eagletac lights and have more than I can keep track of. They have great build quality, UI that I like, and also offer neutral tints on almost all of their models. In fact, I have an Eagletac 2x26650 neutral white model called the SX25L2. I use it for patrol and I love it. The diameter is really nice in my hands. I really hope Eagletac comes out with a 1x26650 at some point. I also like Thrunite's designs for the most part and they also offer neutral white models.