Test/Review of Keeppower 14500 840mAh (Black) 2015

[SIZE=+3]Keeppower 14500 840mAh (Black) 2015[/SIZE]



Official specifications:

• Capacity min.: 800mAh
• Capacity typ.: 840mAh
• Nominal voltage: 3.70V
• Charge voltage: 4.20+/-0.05V
• Standard discharge cut-off voltage: 2.50V
• Standard charge current: 500mA
• Charge termination current: 20mA
• Standard discharge current: 800mA
• Max. continuous discharge current: 4A

Keeppowers high quality 14500 battery with protection.










The cells have good capacity and decent current capability, but performance is a bit lower than last year. I wonder why (Maybe the cells has been in storage for some time)?















[SIZE=+3]Conclusion[/SIZE]

It is good cells and one of the best 14500 on the market.



[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

Thanks again!

I like the Sanyo 840s, but use them sans PCB. My EVVA Sanyos are too long to fit in a few of my lights.

Chris

HKJ, You do such a great job with all the technical stuff and charts and graphs for the technical minded I wonder if maybe you could expand your "In Conclusion" comments just a bit for those of us a little less technically adept? Not asking for in dept analysis just maybe an extra line or two or three in the way of "pros and cons" maybe or something along the lines of "This would be a good cell for such and such a flashlight" or "I wouldn't recommend these for use in ____________"

I think I've got a handle on capacity and volts, beyond that it's all a little foggy to me so any little extra guidance you can give for dummies like me would be appreciated. thanks.

Short_Circuit said:

HKJ, You do such a great job with all the technical stuff and charts and graphs for the technical minded I wonder if maybe you could expand your "In Conclusion" comments just a bit for those of us a little less technically adept? Not asking for in dept analysis just maybe an extra line or two or three in the way of "pros and cons" maybe or something along the lines of "This would be a good cell for such and such a flashlight" or "I wouldn't recommend these for use in ____________"

Click to expand...

I do not want to write that kind of stuff for each battery review, but generally try to add the more general advice in separate articles (But I do not have anything about selecting the best battery for an application).

HKJ said:

I do not want to write that kind of stuff for each battery review, but generally try to add the more general advice in separate articles (But I do not have anything about selecting the best battery for an application).

Click to expand...

If you keep it short and sweet, you remove potential bias, which is always good for a reviewer. If you start waxing poetic about this cell, or that cell, people might misconstrue your zeal for a preference.

Chris

Are these flat top?
Are they protected?

Wolfy1776 said:

Are these flat top?
Are they protected?

Click to expand...

As can be seen in the photos and the info box they are with a small button top (SB).
The protection trips at 4.9A (or a bit sooner if it heats up).

Aren't these essentially identical to the ones tested in 2014?

http://www.candlepowerforums.com/vb...wer-14500-840mAh-(Black)-2014&highlight=14500

SubLGT said:

Aren't these essentially identical to the ones tested in 2014?

http://www.candlepowerforums.com/vb...wer-14500-840mAh-(Black)-2014&highlight=14500

Click to expand...

Yes, but Keeppower send me a new pair.

It seems the original cell is a Sanyo UR 14500P 800mAh.

Thanks a lot for your excellent review. HKJ! :thumbsup:

candle lamp said:

It seems the original cell is a Sanyo UR 14500P 800mAh.

Thanks a lot for your excellent review. HKJ! :thumbsup:

Click to expand...

Yup. I have the old / original version of this battery and I stripped it to fit in my SC52w. Its indeed the Sanyo UR 14500 cell, 840mAh.

candle lamp said:

It seems the original cell is a Sanyo UR 14500P 800mAh.

Thanks a lot for your excellent review. HKJ! :thumbsup:

Click to expand...

http://na.industrial.panasonic.com/...eries/cylindrical-series/CS474/model/UR14500P

Chris

UnderPar said:

Yup. I have the old / original version of this battery and I stripped it to fit in my SC52w. Its indeed the Sanyo UR 14500 cell, 840mAh.

Click to expand...

Thanks for your feedback. UnderPar!

ChrisGarrett said:

http://na.industrial.panasonic.com/...eries/cylindrical-series/CS474/model/UR14500P

Chris

Click to expand...

Ah! Min. capacity is 800mAh and typical 840mAh. Thanks for the link. ChrisGarrett!