18650 Batteries / Chargers

For high drain batteries for vaping, check here: http://www.torchythebatteryboy.com/p/imr-safe-chemistry-batteries.html   or click on the link above.


There are hundreds of 18650 batteries out there, different brands and various capacities, but how do you know if they are any good? Most seem to be well short of the claimed capacity, which in some cases is nothing short of fantasy.
Back in 2010, with the help of Sparky and his custom built battery discharger, I started testing batteries and postingv the results on here.
Sparkys Magic Box
It soon became apparent that a number of batteries are only a fraction of the claimed capacity.
What wasn't expected was under the wrapper of some Ultrafire batteries, a shiny new cap has been fitted. When this is removed, it is clear that they are reclaimed laptop batteries. The spot welds of the tabs can be seen on the base and positive terminal. In the example below, they haven't even bothered to remove all of the tab:

Or, even worse, are batteries that look like 18650...but aren't:
In this case, an 08500 battery concealed in an 18650 outer.

ICR 18650 Battery Test Results
Below are discharge graphs at 250mA, 1A, 2.5A and 5A for some popular batteries (click on images to enlarge):

Aoso 3400mAh (actual capacity 3440mAh)
This battery complies with UK regulations.


Aoso 3000mAh (actual capacity 2723mAh)
This battery complies with UK regulations.

Axatar 2000mAh (actual capacity 2233mAh)
This battery complies with UK regulations.

AWT 3400mAh (actual capacity 3386mAh)
This battery complies with UK regulations.

Beeway 2600mAh (actual capacity 2656mAh)
This battery complies with UK regulations.

Efest 3400mAj protected (actual capacity 3109mAh)
This battery complies with UK regulations.

GEK 3400mAh protected (actual capacity 3337mAh)
This battery does not comply with UK regulations.

GTF 10000mAh (actual capacity 2064mAh)
This battery does not comply with UK regulations.

Intsun 3400mAh protected (actual capacity 1820mAh)
This battery complies with UK regulations.

MecArmy 3400mAh USB (actual capacity 3291mAh)
This battery complies with UK regulations.



Night Wolf 4200mAh protected (actual capacity 1698mAh)
This battery complies with UK regulations.PCB cuts out at 5A
  
Panasonic NCR18650B (actual capacity 3281mAh)
This battery does not comply with UK regulations.

Samsung ICR18650-32A (actual capacity 2659mAh) 
This battery does not comply with UK regulations.


Sanyo NCR18650BF (acual capacity 3312mAh)
This battery does not comply with UK regulations.


SenyBor 2800mAh protected (actual capacity 2823mAh)
This battery complies with UK regulations.
 SenyBor 3100mAh protected (actual capacity 3210mAh)
This battery complies with UK regulations.

SenyBor 3400mAh (actual capacity 3355mAh)
This battery complies with UK regulations.


Soshine 3600mAh protected (actual capacity 3435mAh)
This battery complies with UK regulations.

 
Torchy 2600mAh (actual capacity 2771mAh)
This battery complies with UK regulations.
Trustfire 3000mAh protected (actual capacity 2203mAh)
  

Trustfire 2400mAh (actual capacity 2522mAh)
This battery complies with UK regulations.
 
Trustfire 3000mAh protected (actual capacity
Ultrafire 3600mAh (actual capacity 1060mAh)
This battery does not comply with UK regulations.
 

Ultrafire 6800mAh (actual capacity 1170mAh)
This battery does not comply with UK regulations.
 

Ultrafire 8800mAh (actual capacity 663mAh)
This battery does not comply with UK regulations.


Uniross 2400mAh (actual capacity 2037mAh)
This battery complies with UK regulations.



18650 Battery chargers
Xtar, Efest and Trustfire chargers have been found to be better quality than others on the market so far. Internal fusing, good separation between 240v and DC sides, 3 pin plug and CE marked. Xtar even sent copies of their CE certification.

However, just  because a charger has a CE mark and a 3 pin plug is no guarantee of quality, or safety.  I suspect that Chinese manufacturers will apply the CE mark to their product whether they have achieved the standard or not. 

When one charger exploded, internal inspection suggests the CE mark on the back is totally meaningless:

3 pin plug
 CE Mark
Scorched after the bang
240v supply almost touching DC circuit on pcb!
Diode carrying 240v almost touching battery plate!
Tails on LEDs left too long - almost shorting!
Transistor splitting!

This looks like a compilation of horrors from several chargers, but were all inside one CE marked unbranded charger.