i cant "read" the tests...


you guys post great tests with a lot of numbers and graphs…
THANKS for that! :beer:

but what do they tell me?
what is good and what bad?
and why?
how do i read the graphs?
pros and cons for which application?

maybe one of you can made a (sticky) thread to explain the data?
(could also be a guide for future reviews to have same order)

What graphs and numbers?

It is very difficult to answer a general question about it, if you ask a specific question about a specific chart it is much easier to explain it.

For my reviews, take at look at the bottom. There I often put a link to some explanation, it will not cover everything, but it might help.

It's easier when graphs from different batteries are on the same graphs, then it's obvious that the one with the taller and longer curve is the better battery. HKJ's website allows two batteries to be compared up to 5A.

A taller curve basically means it offers the potential for a brighter light, but that doesn't mean much unless you have a flashlight that pulls high current. Some great batteries for this are the LG HE2, Sony VTC4 and VTC5, and the Samsung -20R and -25R. These typically don't have very high capacity.

A longer curve means it has great capacity (mAh) and will stay on longer. The Panasonic NCR18650B is what most people will think of. While it has high capacity, it's not good at delivering high current.

I believe all of us tests pairs of batteries, which helps average out our own human error, but can also show if batteries don't provide consistent results. For example, Ultrafire batteries frequently perform inconsistently, which can make them dangerous in multi cell lights. Many batteries from Japanese manufacturers are often very closely matched, and are much safer to use in multi cell lights. I'd call consistency one of the strongest indicators of quality, if not the greatest.

When shopping for a battery, you should balance your need for current and capacity, along with price, plus other things like if it's a button or flat top, weight, thickness, length, quality and safety (protection circuit or IMR chemistry).

HKJ would be the best person to do a longer explanation. I may give it a shot if he doesn't, but it'll be after I move.

Does this mock up of HKJ’s Comparator look about right, correct me if i’m wrong on anything thanks.


As i understand it in simple terms, the more that the discharge curve forms a right angle towards the top right hand corner of the graph, the better the cells are for handling that load.

The higher the load on the cell, the more the voltage sags and results in reduced capacity.

Also when a pair of cells are tested, ideally the lines would be on top of each other so you can only make out one discharge curve for the two tested cells.

Now, if only we could get our hands on some of those CRX IO cells… :slight_smile:

I want some of those CRX cells

Nicely done explanation.

me too :slight_smile:

THAT helps! :beer:

and send over 10 CRX cells…

yes, send M4D the 10 remaining cells then send me the rest, i can sell them for a massive profit :bigsmile:

CRX cells for the win!

GB anyone?

Gotta replace all my 18650 cells now since they suddenly became seriously outdated. :D

As the official distributor of CRX cells i authorize this GB :bigsmile:

I’m just waiting on some special labels arriving, will post prices soon. :d

What rate will you give to that cells, must be better than very good :smiley:

Why just 3000 mAh? I believe that can handle 10A easily too :wink:

I do not give high rating to unknown brands, but I may say they have a fantastic performance.

Anyway if I got that kind of curve I would start to look for faults in my equipment (The different current traces will never be on top of each other, especially not when you get up to a few amps).

Well, then that will be a message to CRX to draw another line for that chart :smiley:

If you guys start believing you want cells like that then you may well get your wish. Lucky for you all they will be well padded.

Ok, I want some to, please.

everyone shhhhhh, or elon musk will come and knock down a few doors.

i have some advice for elon, good things come in 3s :bigsmile: