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

Batteries and Chargers Rechargeable Batteries
1

Keeppower 26650 4500mAh (Black) 2014



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




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










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.











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





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

2

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

3

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

4

+1

5

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

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

6

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

Wallbuys.

7

Thanks, picked up their last two..

8

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.

9

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

Cheers,

__philippe

10

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&path=59_88&product_id=190

11

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

12

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.

13

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

14

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

15

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 :slight_smile:

16

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…