Test / Review: Keeppower 16650 2000mAh (Black)

Batteries and Chargers Rechargeable Batteries
1

Keeppower 16650 2000mAh (Black)



Official specifications:

  • 16650 2000mAh Protected Rechargeable Battery
  • Min Capacity: 2000mAh
  • Typical Capacity: 2100mAh
  • Normal Voltage: 3.7V
  • Quality Lithium Ion rechargeable cell
  • In Built Safety Circuitry
  • Protection Circuit (Against overcharge, over discharge, over current and short-circuit.)
  • 4.3 volts max voltage and 3.6-3.7 volts nominal voltage




This battery is a 16650, i.e. it the diameter is less than 18650 batteries, this makes it a good battery for 2xCR123 substitution in lights that are to tight for a 18650.
To get the full capacity from the battery it must be charged with a 4.3 volt charger.








The protection PCB restrict the current to somewhere between 2 and 3A continuous load.









The protection PCB stops this test premature.



The batteries can hand about 3.3A for a short time.





Test with 4.2 volt charging



When charged on a 4.2 volt charger, there is about 80mAh capacity loss.

















Conclusion

The battery size is interesting and can be useful and because it is a new generation LiIon it has better capacity than 17670 batteries, even when only charged to 4.2 volt. As long as it is used to replace CR123 batteries, the current limit will seldom be a problem.
All in all I will rate it as a 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

2

HKJ,

Thanks for the excellent review.

There are some speculations that these are B grade cell, anyway to verify or counter that claim?

3

Not without a know A grade cell.

The specifications say that the cell has 2000mAh to 3V at 2.1A load, this matches my test.

But the specification also says the cell has 2100mAh to 3V at 1.05A load, and this does not match my test.

In my test I do not follow the official charge specification, it says to stop charge at 42mA, I stop at 100mA, this will give slightly lower capacity.

4

Just a comment about usage of 16650 batteries.

I just received a new laptop (HP-Probook) with a 10.8 volt 4200mAh battery, i.e. each cell is 2100mAh. Looking at the battery pack, there is no space for 18xxx cells, this makes me belive that it uses 2100mAh 16650 cells

5

Mind sharing the model number of this batterypack? I need some 16650’s, but I heard that ones currently sold in retail are B-grade, so I’d rather prefer ordering a batterypack with known A-grade cells and take it apart.

6

It says: Replace with HP spare 633805-001

7

Heh, just $40 (and free shipping) for a original/genuine one. That’s just $6.7 per cell - quite awesome
Thanks :slight_smile:

8

Where do you see it for just 40 dollars? Cheapest I see is 50.

9

http://www.ebay.com/itm/290690634576

10

I have been browsing for the HP battery number and can see that some are selling this battery with higher capacity, I wonder if there is space for 18650, but HP has made the version I have with 16650.

11

Thanks as always for all your hard work HKJ!

12

Thanks very much! Frontpage’d and Sticky’d.

13

Guys,

Are these available on the market?

14

im i correct in assuming that the batteries in these laptop packs are unprotected cells? thanks

15

Yes, there is a protection in the battery pack, not on each battery. With the above battery there is a small circuit at the bottom to protect the cell, you can see more here about that.

16

i have been to that page in the recent past on your web-site, very good info. i must say that in my previous lurking here i have read a lot of your posts/ reviews and they are all great and unbiased. as many others have said on here, thanks for all your time-consuming hard work to help everybody here make better informed decisions. thanks for letting me know about the 16650 batteries, as i almost bought the 17650, thinking they were better. your reviews of the sanyo UR16650 protected cells from intl-outdoor and keeppower, were great and i am trying to wrap my head around why the keeppower’s have a greater capacity. is this due to a better protection circuit?

17

There were rumors going around that Intl-Outdoor Store’s version of Sanyo 16650 protected batteries use B-grade rejects from some laptop manufacturer (perhaps Acer?)

18

I get mine from Intl. Outdoor. (Sanyo) These things slide into anything that will accept a CR123. I use them in all my Quarks and other lights that AW17670 are a hair too fat for. If you don’t like stacking cells, get some of these.

19

does anybody know where to buy these batteries??

20

Anyone? I won’t like to get this as well.