Test/Review of UltraFire SZ18650 9900mAh (Yellow)

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HKJ
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Test/Review of UltraFire SZ18650 9900mAh (Yellow)

UltraFire SZ18650 9900mAh (Yellow)
DSC_3684
Official specifications:


  • Capacity: 9900mAH
  • Voltage: 3.7V
  • Size: 65mm x 18mm

UltraFire%20SZ18650%209900mAh%20(Yellow)-info
The latest battery scam from China.
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DSC_3685 DSC_3686
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UltraFire%20SZ18650%209900mAh%20(Yellow)-Capacity
I tried 3 cells, there were surprisingly well matches, but below* rated capacity and not able to deliver much current.
UltraFire%20SZ18650%209900mAh%20(Yellow)-Temp-3.0
They do stay cool.
UltraFire%20SZ18650%209900mAh%20(Yellow)-Temp-5.0
Also at “high” current.
UltraFire%20SZ18650%209900mAh%20(Yellow)-CapacityTimeHours
UltraFire%20SZ18650%209900mAh%20(Yellow)-CapacityTime
UltraFire%20SZ18650%209900mAh%20(Yellow)-Energy
UltraFire%20SZ18650%209900mAh%20(Yellow)-PowerLoadTime
UltraFire%20SZ18650%209900mAh%20(Yellow)-TripCurrent
UltraFire%20SZ18650%209900mAh%20(Yellow)-Charge
Conclusion
Any brand name cell is cheap compared to these, when looking at $/mAh. For cheap cells look for brand name 2600mAh cells, never something above 3500mAh.
The rating is, of course, bad
Notes and links
*“Very much below” is probably more correct.
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
Compare to 18650 and other batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

CRX
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Good to have the total lemons tested once in a while too. Thanks

koyotee
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I hope their factory blows up asap.

Finaly, proud owner of a Powerex Maha mh c-9000 for my Eneloops:)

antiparanoico
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WOW! Better than expected. I expected 99mAh@1A. Big Smile

If anything can go wrong, it will.
Matter will be damaged in direct proportion to its value.

luminarium iaculator
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Those China fakers never give up Smile

About week ago guy laughed at me when I said that I use high quality 3000 mah HG2 18650 batteries these days… He said: Oh that is nothing! I have 9000 mah 18650 cell! Big Smile

One simple fact is that this batteries should got import/export/manufacturing ban…

Werner
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Wow 500mah is really super low capacity, I guess that are the cells which have a smaller cell inside them.

HKJ
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Werner wrote:
Wow 500mah is really super low capacity, I guess that are the cells which have a smaller cell inside them.

Looking at the weight I suspect it. I hope the weather will be nice in the near future, then I will open one of them.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

MRsDNF
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Smile Is this the champion so far in out right lies?

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

MG
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Thanks once again for findings based on real test data. In this case, it’s buyer beware.

everydaysurvivalgear
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You will open it and find a 14500 inside Silly

tarver
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Make a video of the 14500 inside and post on YouTube as a PSA
-
I have a blue Ultrafire 14500 that holds 750 mAhs.

cabfrank
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Crazy. Thanks again HKJ. Just another example of why Ultrafire cells shouldn’t even be considered.

mongoose
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So laughable, and at the same time sad that it’s conning people, quite openly too! At least with your tests out there hkj it will save some from being victims!

homer

will34
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Despite how bad those batteries are, I can’t deny that they did a good job on the packaging. That’s way better than some other famous chinese dealers does… Gearbest often just throw the cells into the shipping bag without any kind of protection. How ironic? Silly

OscarM
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oow… looking forward to you opening up the batteries!

HKJ
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will34 wrote:
Despite how bad those batteries are, I can’t deny that they did a good job on the packaging. That’s way better than some other famous chinese dealers does… Gearbest often just throw the cells into the shipping bag without any kind of protection. How ironic? Silly

Not that good, there was 10 cells in that box.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

1dash1
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500mAh! That’s laughable, if it wasn’t so sad. Tired

There are many 14500 and 16340 batteries that do better.

Rule 1-1 as it applies to life, take it as it comes.

carlodiego
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thanks to your job, HKJ, I avoided bad batteries. Thanks a lot

I like boletus edulis

HKJ
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I got time to take it apart: http://budgetlightforum.com/node/45786

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/