Test/Review of UltraFire SJ18650 6000mAh (Black) 2015

5 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 1 week 6 days ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark
Test/Review of UltraFire SJ18650 6000mAh (Black) 2015
UltraFire SJ18650 6000mAh (Black) 2015

DSC_9646

Official specifications:
  • Color: Black
  • Type: Rechargeable li-ion battery
  • Model: 18650
  • Voltage: 3.7V
  • Capacity: 6000mAh
  • Size: Approx. 6.6 * 1.8cm / 2.6 * 0.7in (Height * diameter)

UltraFire%20SJ18650%206000mAh%20(Black)%202015-info

The cell is not surprisingly significantly below specified capacity. The promised protection is missing.

DSC_9637 DSC_9639

DSC_9640 DSC_9641

DSC_9642
DSC_9643
The wrapper says that the battery is protection, this is not correct.
DSC_9644

UltraFire%20SJ18650%206000mAh%20(Black)%202015-Capacity

Mot much capacity, especially notif you need a couple of amperes. This cell has less capacity than the 2014 version of the same cell. The two cells do track, but not very well.

UltraFire%20SJ18650%206000mAh%20(Black)%202015-CapacityTimeHours

UltraFire%20SJ18650%206000mAh%20(Black)%202015-CapacityTime

UltraFire%20SJ18650%206000mAh%20(Black)%202015-Energy

UltraFire%20SJ18650%206000mAh%20(Black)%202015-PowerLoadTime

UltraFire%20SJ18650%206000mAh%20(Black)%202015-TripCurrent

UltraFire%20SJ18650%206000mAh%20(Black)%202015-Charge



Conclusion

A cheap cell in bad quality, but I did already know that before I tested the cell. The disassembly did also confirm it (see link below).
The rating is, of course, that it is a badcell, but in another way than the red/silver Ultrafire I also disassembled. This cell is produced to be cheap, the red/silver is made from old cell.



Notes and links

Last years review of same cell
I disassembled the battery to see whats inside

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/

Ormbett
Ormbett's picture
Offline
Last seen: 2 weeks 6 days ago
Joined: 02/26/2015 - 09:55
Posts: 1245
Location: Sweden

Good value for the money, not! Thanks for the review!

my9221
Offline
Last seen: 6 hours 12 min ago
Joined: 07/26/2011 - 02:18
Posts: 872
Location: United States

All ultrafire batteries are junk and extremely risky!

202bigmike
Offline
Last seen: 3 hours 16 min ago
Joined: 07/23/2014 - 12:09
Posts: 896
Location: USA

It’s like the *****Fire brand batteries are committing

robbery , just without pointing a weapon in your face !

Ronin42
Ronin42's picture
Offline
Last seen: 2 years 3 weeks ago
Joined: 12/17/2014 - 22:17
Posts: 1760
Location: Alameda, CA

I am not in the business I just want to do some spring cleaning.

I have a limited number of good laptop pulls for sale http://budgetlightforum.com/node/37310

again not my business just trying to clear out space and prevent folks from buying crap, its a win win.

(“It’s good that most people can’t remember their previous lives. Otherwise
things would be a lot more complicated than they already are.”
Ajaan Lee Dhammadharo)