Test/Review of Keeppower 16650 2000mAh (Black)

HKJ

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[size=+3]Keeppower 16650 2000mAh (Black)[/size]

DSC_2616.jpg


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

Keeppower%2016650%202000mAh%20(Black)%204.3V-info.png


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.

DSC_2613.jpg

DSC_2617.jpg
DSC_2618.jpg

DSC_2619.jpg

DSC_2620.jpg


Keeppower%2016650%202000mAh%20(Black)%204.3V-Capacity.png


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

Keeppower%2016650%202000mAh%20(Black)%204.3V-CapacityTimeHours.png


Keeppower%2016650%202000mAh%20(Black)%204.3V-CapacityTime.png


Keeppower%2016650%202000mAh%20(Black)%204.3V-Energy.png


Keeppower%2016650%202000mAh%20(Black)%204.3V-PowerLoadTime.png


The protection PCB stops this test premature.

Keeppower%2016650%202000mAh%20(Black)%204.3V-TripCurrent.png


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

Keeppower%2016650%202000mAh%20(Black)%204.3V-Charge.png




[size=+3]Test with 4.2 volt charging[/size]

Keeppower%2016650%202000mAh%20(Black)-info.png


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

Keeppower%2016650%202000mAh%20(Black)-Capacity.png


Keeppower%2016650%202000mAh%20(Black)-CapacityTimeHours.png


Keeppower%2016650%202000mAh%20(Black)-CapacityTime.png


Keeppower%2016650%202000mAh%20(Black)-Energy.png


Keeppower%2016650%202000mAh%20(Black)-PowerLoadTime.png


Keeppower%2016650%202000mAh%20(Black)-TripCurrent.png


Keeppower%2016650%202000mAh%20(Black)-Charge.png




[size=+3]Conclusion[/size]

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.



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

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
 

MichaelW

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Do these use the LiNiCoO2 NNP cell design?
Will the 17670 ever increase in capacity?
 

HKJ

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Do these use the LiNiCoO2 NNP cell design?

That is a Panasonic technology and this cell was designed by Sanyo (Sanyo is now a part of Panasonic). The Sanyo datasheet does not specify anything about cell design.

Will the 17670 ever increase in capacity?

Depends, if some manufacturer want to use a few millions cells in that size, the large LiIon manufacturer might update the design.
 

välineurheilija

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Any news updates on this battery? Perhaps from someone that has used it.
Any issues with usage and charging?
I am using this battery in a Surefire G2X pro but i havent done any runtime tests and i charge it with a Nitecore intellicharger I4 V2.No problems so far :)
 

LEDAdd1ct

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Roger that.

Thank you.

Now that Sanyo is a (subsidiary?) of Panasonic, what will happen to Sanyo branded cells?
 

Diesel Pro

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I have a couple of lights that could use these batteries, but I have a couple of questions:

1) How much capacity is lost at 4.3v versus 4.3v?

2) Why 4.3 when 4.2 seems to be the standard?

3) Will a typical protected cell by other mfr charge safely in a charger that outputs 4.3v?

4) Is there a good charger that can do multiple different batteries and 4.3v that you'd recommend? I'm thinking 26650, 18650, maybe 17670, and possibly some aa type shorts.

The Thrunite MCC-4 looks decent, but is 4.2v and a USB out would be handy.
 

HKJ

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I have a couple of lights that could use these batteries, but I have a couple of questions:

1) How much capacity is lost at 4.2v versus 4.3v?

Please check the review, it contains data for both 4.3 volt and 4.2 volt.

2) Why 4.3 when 4.2 seems to be the standard?

This is one way to increase capacity.

3) Will a typical protected cell by other mfr charge safely in a charger that outputs 4.3v?

Mostly, especially with cheap batteries there is an increased risk (The big brands are tested that they can handle over charge).
Using 4.3 volt on a 4.2 volt battery will overcharge the battery and seriously reduce lifetime.

4) Is there a good charger that can do multiple different batteries and 4.3v that you'd recommend? I'm thinking 26650, 18650, maybe 17670, and possibly some aa type shorts.

It looks like Xtar has a new charger that can do 4.35 volt, but I have not tested it yet.
At the current time the best solution for 4.30 volt is a hobby charger, where the output can be adjusted (Like iCharger), but that adjustment can only be adjusted to 4.30 volt, not 4.35 volt (As some other batteries requires).

The Thrunite MCC-4 looks decent, but is 4.2v and a USB out would be handy.

The usb output on chargers can usual not be used while it is connected to power, only from a battery and for that purpose I will recommend getting a separate usb box.
 

tobrien

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HKJ, I have two of these cells and just to clarify, is 4.35 volts what the charger will have to put out?

I am going to be buying an XTAR SP1 for some LG D1 cells (I will be buying those D1 cells at the same time as the SP1), but it appears there are 4.3 volt cells as a different class or something.

Are 4.35 and 4.3 volt cells the same thing or is it just semantics that is causing this confusion?

This review says 4.3 volts, but cottonpicker's charger and the XTAR SP1 both say 4.35 volts, for example, so is this cell not okay to use with the cottonpickers 4.35v charger or the XTAR SP1?

edit: my two 16650 2000 mAh cells I actually bought because of your review! :)

I see you kind of answered this question in the post above, but I'm not entirely clear still on if 4.3 vs. 4.35 is a huge difference or just a semantics thing or they shouldn't be mixed lol
 
Last edited:

HKJ

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HKJ, I have two of these cells and just to clarify, is 4.35 volts what the charger will have to put out?

I am going to be buying an XTAR SP1 for some LG D1 cells (I will be buying those D1 cells at the same time as the SP1), but it appears there are 4.3 volt cells as a different class or something.

Are 4.35 and 4.3 volt cells the same thing or is it just semantics that is causing this confusion?

This review says 4.3 volts, but cottonpicker's charger and the XTAR SP1 both say 4.35 volts, for example, so is this cell not okay to use with the cottonpickers 4.35v charger or the XTAR SP1?

There are both 4.30 and 4.35 volt cells, they are not the same thing.

Using a 4.35 volt charger on a 4.30 volt will overcharge it and reduce the lifetime of the cell.
 

msnake103

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I looked at these batteries for a while before placing them in two slightly modified Surefire E2D models. The first is an incandescent with a Lumens Factory EO-E1R 3.6V bulb, and the second is a LED with a Malkoff Devices E2/Scout M600 2-3 CR123 3.4-9.0V head. While I don't have the equipment or experience to provide any detailed runtimes or battery performance data, I can say that the batteries fit perfectly in a E2 body and have performed very well in both lights while carried on a rotating daily basis.
 

editedby

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I'm not able to locate these from a USA dealer. Anyone have a source? FYI Keeppower.com.cn has these listed as 2200 @3.7
 

__philippe

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If you ask me, CN dealer trumps no dealer at all. Beggars can't be choosers...;)

__philippe
 

BillSWPA

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Just ordered two of these from Illumination Supply, although they are 2,500 mAh instead of 2,000 mAh, with a maximum voltage of 4.35 v. If these work as expected in my FourSevens QT2L, I may be looking for a 4.35 v. charger. If the unused capacity from using a 4.2 v. charger is on the same order as the 2,000 mAh cells tested above, it does not appear that I will be losing much capability by using my current 4.2 v. charger until a 4.35 v. charger can be located.
 

Aperture

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I have two of these 2000mAh batteries and they fit perfectly in stock Surefire E2E, 6P and C2 bodies.

It's mainly used charged to 4.2V with Tana's low voltage TripLED 219 on an 11 year old E2O body with the option to switch to AA in case they run out.
 

tobrien

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Just ordered two of these from Illumination Supply, although they are 2,500 mAh instead of 2,000 mAh, with a maximum voltage of 4.35 v. If these work as expected in my FourSevens QT2L, I may be looking for a 4.35 v. charger. If the unused capacity from using a 4.2 v. charger is on the same order as the 2,000 mAh cells tested above, it does not appear that I will be losing much capability by using my current 4.2 v. charger until a 4.35 v. charger can be located.
I think the difference with the new Keeppowers is they are UR16650ZTA, whereas what HKJ reviewed here were the UR16650ZT (no -A at the end)
 
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