18650 test - Not the best ones tested .

[old4570]

As the heading suggests , these are the batteries I have found to be , towards the lower end of performance ...

1- BRC3600 - Stopped @ 4.11v [ UF-188 charger ] then 4.19v in my Trustfire Charger [ No sag 4.19v ]
2- Senybor - 4.17v [ UF-188 charger ] 4.2v in my TR-001 [ Sagged to 4.18v ]
3- Spiderfire - 4.14v [ UF-188 ] , 4.19v TR-001 [ Sagged to 4.15v ]
4- Eagletac - 4.17v TR-001 , wont charge higher [ No sag 4.17v ]
5- BRC3000 - 4.13v [ UF-188 ] 4.19v TR-001 [ sagged to 4.17v ]
6- GTL - 4.2v [ No sag 4.2v ]

My WF-188 is a little sensitive to the internal resistance , so gives a small insight into cell quality , so check out the terminations ..

My TR-001 usually goes 4.2v so when cells wont go there ? again , speaks some what for the cells quality ...

Some discharge tests ... Matched to picture
..................... SSC P7 ........ XP-GR5....... XR-ER2 ..........XR-ER2 .........P7
1. Spiderfire .....2.26A.............1.67A........1.45A..............1.5A.............2.15A
2. GTL ............2.86A.............1.83A........1.58A..............1.65A...........2.34A
3. Senybor ......1.96A.............1.5A..........1.4A................1.4A............1.93A
4. BRC3000.......2.08A.............1.57A........1.45A..............1.45A..........2.01A
5. BRC3600......2.21A.............1.63A.........1.45A..............1.57A..........2.07A
6. Eagletac......2.2A...............1.64A.........1.5A...............1.56A...........2.14A

For most of the cells , the performance is very close across the board .. The GTL has the best performance but also the lowest capacity [ possibly 1400mA ] , the Senybor is literally at the very bottom for performance , and the rest are some what close .. As can be seen , as the current requirements lower , the batteries really even out , and picking a clear stand out becomes more difficult .. So bellow 1.5A , there really is very little to set the batteries apart [ OK the GTL stands out , but it has so little capacity ] . Going with a slightly lower current SSC P7 , we can see that the batteries are close again , but going with my high performance SSC P7 we can see where each cell maxes out . [ Again close ] ...

Better Chinese cells will go 2.6A and up to around 3A , and Japanese will go to the other side of 3A ...
When you charge batteries , the thing to watch out for is sag after charging ... Will once again give you some insight into cell quality ...
If there was a barrel , you would have to reach right down for these ones ... :welcome:

 

[how2]

What is sag?

How did you calculate runtime?

I have a DMM and want to measure mAH and runtime, what should i do?

 

[don.gwapo]

Like to see the Redilast 18650 2600 & 2900mAh in comparison with other brands soon.

 

[old4570]

What is sag?

How did you calculate runtime?

I have a DMM and want to measure mAH and runtime, what should i do?

Sag ... Battery is charged to 4.2v , after some rest [ 60 minutes ] the battery may stabilize to its true charge state ,, Good cells will usually hold the termination voltage [ 4.2v ] , cells that have degraded , or are of lower quality may not be able to hold termination voltage .. The more the voltage sags , the worse the possible condition of the cell ..

What run time ? I tested discharge capability , better cells usually are capable of higher discharge ... These cells have been tested before [ see link bottom left ] I just wanted to compare the , not impressive cells .

For example the Aw2600 = 2.95A , Trustfire 2500 Grey = 2.95A , IMR = 3.15A

Lower quality cells , have lower discharge capability , and so far these are the lowest I have seen ...

 

[mvyrmnd]

So, with the WF-188, the lower the cutoff voltage, the higher the internal resistance of the cell, therefore the poorer the condition, right?

In that case you could use the WF-188 to give you a rough indication of the health of your cells...

I just ordered one, it might be a useful "feature"

I also have a TR-001. It cuts off pretty reliably at 4.21V. I've noticed that it cuts off at lower voltages when charging smaller cells (16340, 18350). Does yours to that?

Also, just to pollute this thread further: I'd love to see you test some of these

 

[old4570]

So, with the WF-188, the lower the cutoff voltage, the higher the internal resistance of the cell, therefore the poorer the condition, right?

In that case you could use the WF-188 to give you a rough indication of the health of your cells...

I just ordered one, it might be a useful "feature"

I also have a TR-001. It cuts off pretty reliably at 4.21V. I've noticed that it cuts off at lower voltages when charging smaller cells (16340, 18350). Does yours to that?

Also, just to pollute this thread further: I'd love to see you test some of these

WF-188 ,,, Yep , thats what i use it for , Im trying to run all my cells through it to see if there ok , or close enough to ok ...
Unfortunately I have a lot cells ...

My TR-001 is pretty much spot on 4.2v , some cells may go lower , [ the not so good ones ] Even RCR123A's terminate @ 4.2v

Thanks for the link , $20USD for 1 cell ???? I might have to start saving now .

 

[forexer]

I'd love to see you test some of these

Some competition to AW? These cells look quite good and cheaper than AWs. Plus they are cells from Panasonic, LG, Sony ect...

 

[LEDAdd1ct]

I'm chomping at the bit for tests of those cells as well.

 

[amigafan2003]

I've ordered 2x Panasonic NCR18650 2900mah (unprotected) cells from jtsgalaxy and 2x of the 2900mah Redilast cells, which should also be Panasonic NCR18650 cells - it will be interesting to compare them.