Test/review of Keeppower 18350 1200mAh UH1835P (Black) 2017

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
[size=+3]Keeppower 18350 1200mAh UH1835P (Black) 2017[/size]

DSC_2344.jpg


Official specifications:
  • Nominal capacity: 1200mAh
  • Nominal voltage: 3.7V
  • Charging method: CC-CV
  • Charging voltage: 4.20V
  • Std. charging current: 500mA
  • Discharge cut-off voltage: 2.00V
  • Max. constant discharge current: 10A
  • Max. pulse discharge current: 15A
  • Size: 18.3 x 35.0mm

Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-info.png


A high current and high capacity 18350 cell from Keeppower

DSC_2342.jpg
DSC_2343.jpg


DSC_2345.jpg
DSC_2346.jpg


DSC_2347.jpg

DSC_2348.jpg


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-Capacity.png


The batteries has good discharge curves, they tracks fairly well and capacity only drops slowly with current. 10A works fine, 15A is too much.

Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-Temp-7.0.png


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-Temp-10.0.png


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-Temp-15.0.png


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-CapacityTimeHours.png


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-CapacityTime.png


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-Energy.png


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-PowerLoadTime.png


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-TripCurrent.png


Keeppower%2018350%201200mAh%20UH1835P%20(Black)%202017-Charge.png




[size=+3]Conclusion[/size]

This battery is from the new generation of smaller cell with much improved performance. This means that this battery is one of the best 18350 at the current time.



[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
Comparison to other LiIon batteries
 

SubLGT

Flashlight Enthusiast
Joined
Nov 18, 2013
Messages
1,183
Location
Idaho, USA
Compared to the Aspire 18350 batteries you tested a few months ago, this Keeppower has a little bit more voltage drop at 5A discharge, and a little less capacity. But the Keeppowers were more closely matched.
 

night.hoodie

Enlightened
Joined
Aug 6, 2014
Messages
717
Location
Lost City of Atlanta
Thanks for your matchless reviews, HKJ.

Compared to the Aspire 18350 batteries you tested a few months ago, this Keeppower has a little bit more voltage drop at 5A discharge, and a little less capacity. But the Keeppowers were more closely matched.

Going by HKJ's reviews, and I admit maybe I didn't look as closely as you, but I think your observations are probably well and entirely within the margin of error, and the two labels are in fact the same cell manufactured at the same location, just IMO.

The Keeppower cell wrap is black, a quality impossible to overestimate its enrichment of whatever it is. Also, the Keeppower has less stuck to the wrap, possibly making the difference in tight bores. Where I have seen these Aspire and Keeppower cells sold, the Aspire was a couple-few bucks less, but the Keeppower comes with a nice clear hard plastic case for the package of 2 cells.

I have been running 8 of these UH1835P Keeppower cells hard the last few days, continuously 1 hour @1.2A from rested 4.18V, and within the second or three it takes me to pull the cell and check the SOC, I read 2.8V- 3.1V. I notice the voltage sag only in the last couple minutes where it is obvious to me the cell is starting to pull closer to 2.5V under load.

I saw myself with my own eyes on repeated occasion, and even I don't believe these cells. I'm used to running 550mAh AW IMR16340 cells. Those AW are really really great cells, but these new high capacity, high current 18350 cells seem miraculous in comparison, giving me comparible performance for more than twice as long.

Seems weird to me that there are not multiple threads raving about these little wonders. Is 18350 still not yet mainstream? No matter the wrap, use these cells and keep them in business.
 

SubLGT

Flashlight Enthusiast
Joined
Nov 18, 2013
Messages
1,183
Location
Idaho, USA
Discharge cut-off voltage: 2.00V

Can this cell really be taken down to 2.00V without damaging it?


I see that ilumn.com has it in stock. On the product page they have this unusual note:
Please put in order notes which light you are using this cell in and we will make sure to get you one that fits.
They show the maximum diameter as 18.6mm. HKJ has posted 18.3mm as the diameter.
 
Last edited:

stans

Newly Enlightened
Joined
Oct 16, 2017
Messages
11
Location
AB. Canada
Can this cell really be taken down to 2.00V without damaging it?


I see that ilumn.com has it in stock. On the product page they have this unusual note:

They show the maximum diameter as 18.6mm. HKJ has posted 18.3mm as the diameter.

The two that I'm using in my boss are very close to 18.3 mm.
 

peterharvey73

Flashlight Enthusiast
Joined
Apr 12, 2011
Messages
1,005
Sorry, but I haven't been on this forum for years - or purchased any flashlight for years.
I am totally out of touch.

I have multiple Jetbeam RRT-01's with AW IMR 18350 700 mAh batteries.
Is this Keeppower IMR 18350 1200 mAh the current flagship of IMR 18350 batteries?
 

badtziscool

Flashlight Enthusiast
Joined
Oct 13, 2006
Messages
1,722
Yup. Pretty much the go to 18350 today.

Sorry, but I haven't been on this forum for years - or purchased any flashlight for years.
I am totally out of touch.

I have multiple Jetbeam RRT-01's with AW IMR 18350 700 mAh batteries.
Is this Keeppower IMR 18350 1200 mAh the current flagship of IMR 18350 batteries?
 

raggie33

*the raggedier*
Joined
Aug 11, 2003
Messages
13,451
i was wondering how long can i keep stored charged b4 they drop to like 90%
 

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
i was wondering how long can i keep stored charged b4 they drop to like 90%

I cannot tell you that, but generally the self discharge of LiIon is fairly low (Protection do not matter) and they can keep a charge for a couple of years.

The "Protection do not matter" is because the current consumption of protection is fairly low, i.e. when storing LiIon batteries for years it will affect the result by some percent, but due to the general LiIon degeneration with time the protection is not really that significant.
 
Top