Keeppower 16650 2000mAh (Black)
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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
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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.
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The protection PCB restrict the current to somewhere between 2 and 3A continuous load.
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The protection PCB stops this test premature.
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The batteries can hand about 3.3A for a short time.
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Test with 4.2 volt charging
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When charged on a 4.2 volt charger, there is about 80mAh capacity loss.
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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
My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/
HKJ,
Thanks for the excellent review.
There are some speculations that these are B grade cell, anyway to verify or counter that claim?
Prisoner 6-2-7
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.
My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/
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
My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/
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.
It says: Replace with HP spare 633805-001
My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/
Heh, just $40 (and free shipping) for a original/genuine one. That’s just $6.7 per cell – quite awesome
Thanks
Where do you see it for just 40 dollars? Cheapest I see is 50.
My LED comparison thread with links.
Tint, Binning, and CRI Explanation (For the XM-L)
http://budgetlightforum.com/node
http://www.ebay.com/itm/290690634576
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.
My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/
Thanks as always for all your hard work HKJ!
Don wrote:
"But as I said long ago, you are more likely to be killed by a dead fish dropped by a seagull in the Sahara Desert than by a lithium ion
Thanks very much! Frontpage’d and Sticky’d.
Budget Light Forum ...where Frugal meets with Flashlight!
Guys,
Are these available on the market?
Prisoner 6-2-7
im i correct in assuming that the batteries in these laptop packs are unprotected cells? thanks
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.
My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/
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?
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.
does anybody know where to buy these batteries??
Anyone? I won’t like to get this as well.
Prisoner 6-2-7
It seems from Finland http://www.akkula.fi I have ordered some 16650’s, I have no connection with the seller, but this is the first website i have seen selling keeppowers. Thought i would share the (hopefully) good news.
HKJ: have you confirmed your pack contains 16650’s?
Anybody ever determine if the 16650’s can be had in the HP spare 633805-001 battery packs? I located new one (4200ma) that states 6 cells in it for $24 shipped. I see they have a 5200ma? battery pack also, but it may contain 18650’s for all i know???
No, the guy that using the computer will not let me disassemble the battery pack.
My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/
BUMP
Prisoner 6-2-7
http://www.intl-outdoor.com/2-pcs-sanyo-ur16650zt-min-2100mah-liion-batt...
Tick "protected". They are made by Keeppower and are almost as good.
Yes but I need another source.
Prisoner 6-2-7
very interesting…. this would make for a great option in my mini mag mod im planning…
i have one of those cheap chargers from intl outdoor that actually charges to 4.27 volts too LOL. (rated at 4.2 +/- 0.05v)… i guess its plus! lol.
Why?
Let me rephrase, I need another “cheaper” source.
Prisoner 6-2-7
Keeppower is not cheaper than Intl-Outdoor, they are usually more expensive. So far there are no protected budget cells but you can get them unprotected.
Ahem!
Keeppower 16650 Battery Built In Sanyo UR16650ZT Cell
Prisoner 6-2-7
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