Test/Review of Keeppower 26650 4500mAh (Black) 2014

16 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark
Test/Review of Keeppower 26650 4500mAh (Black) 2014
Keeppower 26650 4500mAh (Black) 2014

DSC_4856

Official specifications:
  • Min Capacity: 4450mAh
  • Typical Capacity: 4500mAh
  • Max Capacity: 4650mAh
  • Normal Voltage: 3.7V
  • Standard Charge Current: 2.0A
  • Max Constant Discharge Current: 13.0A
  • Size: L:69.60mm*D:26.60mm
  • Protection Circuit (Against overcharge, over discharge, over current and short-circuit.)
  • 4.2 volts max voltage and 3.7 volts nominal voltage
  • Over 500 charge-discharge cycles

Keeppower%2026650%204500mAh%20(Black)%202014-info

This is a 26650 with a high capacity marking and even higher capacity than marked.

DSC_4855

DSC_4857 DSC_4858

DSC_4859
DSC_4860

Keeppower%2026650%204500mAh%20(Black)%202014-Capacity

The battery has a lot of capacity, but the cells does not track at higher currents, making it difficult to use them in series configuration.
The battery is best used at 7A or lower load.

Keeppower%2026650%204500mAh%20(Black)%202014-CapacityTimeHours

Keeppower%2026650%204500mAh%20(Black)%202014-CapacityTime

Keeppower%2026650%204500mAh%20(Black)%202014-Energy

Keeppower%2026650%204500mAh%20(Black)%202014-PowerLoadTime

Keeppower%2026650%204500mAh%20(Black)%202014-TripCurrent

The battery has a protection, but the trip point is too high.

Keeppower%2026650%204500mAh%20(Black)%202014-Charge



Conclusion

The battery has an impressive capacity and work fairly well up to 7A load.
The over current protection is placed at to high value and will not protect the battery from overload. I suppose that over discharge and over charge will work.



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/

kralyevski
kralyevski's picture
Offline
Last seen: 1 month 1 week ago
Joined: 02/05/2013 - 08:37
Posts: 342
Location: Macedonia

thanks for the review, and may i ask where can we get these? (with reasonable price for shipping if possible)

“the easiest way to become a MILLIONAIRE is: first you become a BILLIONAIRE than you start to be flashaholic”

Bort
Bort's picture
Online
Last seen: 13 min 59 sec ago
Joined: 06/01/2012 - 17:15
Posts: 8349
Location: Holding the proverbial flashlight

Thanks for the review, thats the highest output 26650 yet!
What company is HT that makes these cells?

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

 

 

RaceR86
RaceR86's picture
Offline
Last seen: 5 years 9 months ago
Joined: 02/22/2012 - 08:32
Posts: 3777
Location: Norway

kralyevski wrote:
thanks for the review, and may i ask where can we get these? (with reasonable price for shipping if possible)

+1

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark

kralyevski wrote:
may i ask where can we get these? (with reasonable price for shipping if possible)

Probably all places that sells Keeppower cells, especially if many people ask for them.

Bort wrote:
What company is HT that makes these cells?

I suppose it is a Chinese company, but I do not know anything about them.

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

leaftye
Offline
Last seen: 11 months 3 weeks ago
Joined: 07/25/2012 - 17:43
Posts: 4278
Location: San Diego, CA

Thanks for the review.  Hopefully we'll be able to get the cell inside by itself soon.

kralyevski wrote:
thanks for the review, and may i ask where can we get these? (with reasonable price for shipping if possible)

Wallbuys.

The low mode should be lower.

RaceR86
RaceR86's picture
Offline
Last seen: 5 years 9 months ago
Joined: 02/22/2012 - 08:32
Posts: 3777
Location: Norway

leaftye wrote:

Wallbuys.

Thanks, picked up their last two..

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

DARCANGEL
DARCANGEL's picture
Offline
Last seen: 4 months 1 week ago
Joined: 04/11/2012 - 00:06
Posts: 988
Location: the nickel city,New York

Thanks for the review HKJ,great news about the capacity but disappointing about the protection circuit.It's a false sense of security to have a protected cell that will not trip,and decieves the buyer.I think Keeppower should recall the battery until the protection is fixed or list it as unprotected.Thanks for this helpful review.

__philippe
Offline
Last seen: 6 years 9 months ago
Joined: 07/22/2013 - 09:00
Posts: 48
kralyevski wrote:
thanks for the review, and may i ask where can we get these? (with reasonable price for shipping if possible)

Nearest and cheapest to your place would most probably be here :

http://eu.nkon.nl/keeppower-26650-4500-li-ion-battery.html

Cheers,

__philippe

brad
brad's picture
Offline
Last seen: 8 hours 21 min ago
Joined: 12/04/2012 - 02:07
Posts: 2408
Location: USA

HKJ, I bought a black, protected, 4000mAH 26650 (edit) King Kong, from Mountain Electronics, but the one I received is labelled 4500mAH, do you have a theory on that?

Here is the battery, the only difference is 4500 in place of the 4000.
http://www.mtnelectronics.com/opencart/index.php?route=product/product&p...

Not what we have but what we enjoy, constitutes our abundance.

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark

brad wrote:
HKJ, I bought a black, protected, 4000mAH 26650 from Mountain Electronics, but the one I received is labelled 4500mAH, do you have a theory on that?

No. If the battery is assembled by Keeppower it might be this cell, but without any information about that, I can not say anything.

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

brad
brad's picture
Offline
Last seen: 8 hours 21 min ago
Joined: 12/04/2012 - 02:07
Posts: 2408
Location: USA

Would King Kong relabel a Keeppower, or does King Kong make it’s own batteries?

The 4500 on the label seems to have just suddenly happened, and I can’t find anything on the internet mentioning a 4500 (labelled) King Kong.

Not what we have but what we enjoy, constitutes our abundance.

Ejected Filament
Ejected Filament's picture
Offline
Last seen: 9 months 1 week ago
Joined: 12/03/2013 - 04:29
Posts: 2343
Location: Qld, Australia

Wasnt the older Keeppower 4000mAh? If Im right its most likely just newer stock and they sold all their 4000s.

__philippe
Offline
Last seen: 6 years 9 months ago
Joined: 07/22/2013 - 09:00
Posts: 48

The official KeepPower site currently displays 26650 /4500 mAh cells,
including “Cell made in China” in the specs

http://www.keeppower.com.cn/products_detail.php?id=452

Cheers,

__philippe

exfever
Offline
Last seen: 8 months 4 weeks ago
Joined: 03/10/2014 - 09:29
Posts: 16

Thanks for the informative review HKJ!
I have bookmarked your website lygte way before I joined this forums and it was a surprise seeing your website in your signature!

Really appreciate all your effort in doing awesome and informative reviews Smile

musicmagic
Offline
Last seen: 6 years 9 months ago
Joined: 10/28/2013 - 09:53
Posts: 984
Location: CT

is there a source that currently sells either the bare cell or the one with the protection circuit?

Their website does not have a buy option as far as I can see…

If you can’t blind them with your brilliance, baffle them with your bullcrap.

The real currency in the world is not money, it’s trust.