Efest 18650 3100mAh Test + Blazar 3100 Test

33 posts / 0 new
Last post

Pages

old4570
Offline
Last seen: 18 hours 12 min ago
Joined: 09/06/2010 - 02:44
Posts: 3316
Location: Land of Oz
Efest 18650 3100mAh Test + Blazar 3100 Test

imagebam.com

..
.. Efest 3100
. Lets get straight to the results : At one amp discharge the Efest 3100 returned 2762mAh , at two amp discharge it returned some 2565mAh , and at three amp discharge it returned some 1928mAh . As can be seen , 3A is starting to strain the battery and voltage sag is enough to be really noticed . In each discharge test , [ sorry , I will have to work it out for each discharge level , but at 3A cut off voltage was 3v ]
.
.
.Blazar 3100
. At one amp discharge the Blazar returned some 2699mAh , at two amp discharge it returned some 2486mAh , and at three amp discharge returned some 1635mAh . As can be seen , the battery was struggling some what at three amps . Once again termination was [ sorry , I will have to work it out for each discharge level , but at 3A cut off voltage was 3v ]
.
.
.
.Testing the batteries in two reasonably high current flashlights : [ Manafont 3 mode XM-L P60 drop ins ]
. Efest in light no 1 : 3.5A / Light no 2 : 3.7A
.
.Blazar in light no 1 : 3.5A / Light no 2 : 3.4A
.
.
. The Efest battery does appear to perform reasonably well , and may be a decent battery for high performance applications , but bear in mind it is feeling 3A .
And with so many people wanting more power , really high grade batteries may be the order of the day . I would rate Efest above average as my Solarforce v2 18650 did some 3.9A in the first light , so the Efest was not really outstanding ..
.
.
. The Blazer was disappointing @ 3A discharge , and I would rate the battery average based on my testing so far . The battery really felt the 3A discharge , and whilst not completely falling on its face , did fail to impress . Would I be tempted to buy more = No !

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

Edited by: old4570 on 10/19/2012 - 20:12
MRsDNF
MRsDNF's picture
Online
Last seen: 1 min 55 sec ago
Joined: 12/22/2011 - 21:18
Posts: 12135
Location: A light beam away from the missus in the land of Aus.

Thanks old4570. Do you know if the batteries are the same with the difference being the protection?

My current and or voltage measurements are only relevent to anything that I measure.

Budget light hobby proudly sponsored by my Mastercard and unknowingly paid for by a hard working wife. 

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

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.

 

old4570
Offline
Last seen: 18 hours 12 min ago
Joined: 09/06/2010 - 02:44
Posts: 3316
Location: Land of Oz

Based on Panasonic 3100 cells , ! [ Claimed ]

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

fartybum
Offline
Last seen: 3 years 7 months ago
Joined: 08/17/2012 - 19:29
Posts: 348
Location: UK
old4570 wrote:
Based on Panasonic 3100 cells , ! [ Claimed ]

Hard to beleive with such poor results Sad

kevind43
Offline
Last seen: 6 months 2 weeks ago
Joined: 01/24/2012 - 17:47
Posts: 462
Location: ny

thanks OLD4570 . good info. do you have anything on the efest 3400 protected?

SpaceCowboy
Offline
Last seen: 1 week 3 days ago
Joined: 12/30/2011 - 16:41
Posts: 244
Location: Florida

Thank you for review.

Results are far from real Panasonic NCR performance cells.

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia

I don’t understand these results. I tested one of my Blazars from 4.09v down to 2.7v @ 3.0A and got just over 2700 mAh. I imagine that it would have been close to 3000 mAh if it had started at 4.2v. Further, all my Blazars put out over 5A in a couple of my direct drive lights, and I’ve briefly seen over 6A when testing a single cell in my Sky Ray King.

I have 6 Blazars in total, so I might run some additional tests myself. Perhaps you just got a bad cell or something. But a bad NCR18650A? That must be pretty uncommon.

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia

Just tested another one of my Blazars. My charger doesn’t charge my 18650’s right up to 4.2v, so this one started out at 4.14. Result was 2804 mAh down to 2.7v @ 3A.

SpaceCowboy
Offline
Last seen: 1 week 3 days ago
Joined: 12/30/2011 - 16:41
Posts: 244
Location: Florida

Different batch (possible different cell) will give different results.

New, and unknown batt. suppliers can use any battery they want to and rate it 3100mAh

We already know about Ultrafire, it wouldn’t be anything new to get a few more players with the same Ultrafire “game”

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia

The eBay seller that the Blazar branded batteries come from has been selling genuine Panasonic NCR18650A cells for over a year, without a single bad piece of feedback. Not even a neutral. And given that they are quality cells, at the expected price point for such, there’s a good chance that a significant portion of his customers know the difference. I do, as do some other Aussie members around here who use the same cells. I think it’s ridiculously unlikely that he’s trying to scam anyone by repackaging shitty cells. That sort of thing would get noticed pretty quicky by the sort of customer base he would have.

These are the Blazar branded cells in question: http://www.ebay.com.au/itm/2x-BLAZAR-PROTECTED-Panasonic-NCR-18650-3100m...

EDIT: Tested a third Blazar, purchased recently (7th Oct). This time, 4.11v down to 2.7 @ 3.0A resulted in 2723 mAh.

Note: I’m not convinced that my discharge setup is low resistance enough either. I’m using cheap single bay chargers with the guts ripped out of them, which are perfectly fine for charging batteries, but weren’t modded with high discharge in mind. I guess that means I have a new project Smile

pounder
pounder's picture
Offline
Last seen: 1 year 5 months ago
Joined: 01/20/2011 - 16:43
Posts: 1788
Location: Ontario

doesn’t give me hope for the efest 2600’s on manafont..(claimed sanyo cell)..

edit:

old..your test of the solarforce v3 at 3a showed similar results..i’ve seen other solarforce v3 tests that contradict your findings (link after paragraph) on those cells..these blazar and efests cells are showing the same low capacity at 3a on your tests like the solarforces did..what equipment are you using? is there a way to know for sure that it isn’t malfunctioning? not being disrespectful or rude here just trying to get to the bottom of the difference in the tests..what do your genuine unprotected panasonic 2900 and 3100 show for capacity at 3a?

http://www.messerforum.net/showthread.php?109979-Messerforum-Lampenteste...

DON KIDIK
DON KIDIK's picture
Offline
Last seen: 5 years 6 months ago
Joined: 08/29/2012 - 13:29
Posts: 376
Location: Gods country WIGAN
fartybum wrote:
old4570 wrote:
Based on Panasonic 3100 cells , ! [ Claimed ]

Hard to beleive with such poor results Sad


+1,I also was lead to beleive these tobe Panasonic cells.Infact the supplier[Bestvapping] posted the info on another thread.May do a check myself over the weekend.

DON…

old4570
Offline
Last seen: 18 hours 12 min ago
Joined: 09/06/2010 - 02:44
Posts: 3316
Location: Land of Oz
Well , its not capacity in direct relation to energy stored : Its voltage sag : @ 3amp discharge , the voltage sag is severe , [ on my charger ] Turnigy Accucell -8150 The other charger is a Imax B6 , so only discharges to 1A I did voltage calibrate the Turnigy when I got it .. Might recheck it right now … Hmmmm, been thinking of getting another charger ! As for the battery ? Not sure the re-seller has much choice as to what goes into the components .. But these batteries were only just sourced this month .. So ??

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

RedForest UK
RedForest UK's picture
Offline
Last seen: 3 months 3 weeks ago
Joined: 06/06/2011 - 11:27
Posts: 1049

I have no direct experience with Blazar, but they look to be keeppower OEM. Efest make top quality batteries too afaik so I personally would not question either of these cells being genuine. Maybe something to do with the testing set-up?

I would 2nd a 3 amp test on some unprotected and clearly genuine Panasonic cells to verify this if possible.

old4570
Offline
Last seen: 18 hours 12 min ago
Joined: 09/06/2010 - 02:44
Posts: 3316
Location: Land of Oz

Actually its the charger !

Looks like the higher the discharge rate – the higher the discrepancy on calibration … So at 3 Amp the actual true cut of voltage was = 3v and not 2.7v So at 3Amp its 3 tenths out , so charger is reading 3 tenths less than actual true MM read voltage .. So let me adjust that a little : Termination voltage would be 3v @ 3amp current draw … Update : 3A = 3 tenths out , 2A = 2 tenths out , 1A = one tenth out … Wow ! Hmmm , Turnigy looks to bite some what … Hmmm , even the Imax B6 is one tenth out @ 1A discharge ..

Charger sais 3.8v and MM sais 3.9v so , is this normal behavior ?
.
.

You guys want to check ?
.
.

Charger sais Voltage = ? Discharge rate - Multi Meter sais Battery is ? Discharge rate
.
.

Let it discharge for a few minutes to stabilize , since both my charger behave this way , I can only assume its normal ..
.
.

And the issue may indeed be the batteries themselves ,

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

LAB
Offline
Last seen: 5 months 2 weeks ago
Joined: 07/28/2012 - 20:39
Posts: 90

cainn wrote:
I don’t understand these results. I tested one of my Blazars from 4.09v down to 2.7v @ 3.0A and got just over 2700 mAh. I imagine that it would have been close to 3000 mAh if it had started at 4.2v. Further, all my Blazars put out over 5A in a couple of my direct drive lights, and I’ve briefly seen over 6A when testing a single cell in my Sky Ray King.

I have 6 Blazars in total, so I might run some additional tests myself. Perhaps you just got a bad cell or something. But a bad NCR18650A? That must be pretty uncommon.

Your Blazars are protected and put out over 5 amps?

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia

Have you considered the possibility that there may be a significant degree of resistance in your discharge setup? For example, I use cheap single bay chargers with the circuitry removed, hooked up to my Hyperion EOS1210i. One of them is unsuitable for high current discharge tests because when using it, the voltage almost immediately sags to around 3.4 when doing a 3A discharge on a fresh cell. Using the same cell in a different bay that applies significantly more contact pressure on the battery terminals (and probably has lower resistance internally as well) results in a voltage reading slightly above 3.7 at a 3A discharge, which is right where it should be for a freshly charged cell.

Discharging at 5A drives the point home. All my Blazars will fail dismally in the high resistance bay, with the setup sagging to 2.7v within seconds. In the better one, they’ll stay at just over 3.5v initially, and discharge in a much more respectable manner from there.

Even my good charging bay needs improvement I think. I’m going to get stuck into fixing them both up soon.

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia

LAB wrote:
cainn wrote:
I don’t understand these results. I tested one of my Blazars from 4.09v down to 2.7v @ 3.0A and got just over 2700 mAh. I imagine that it would have been close to 3000 mAh if it had started at 4.2v. Further, all my Blazars put out over 5A in a couple of my direct drive lights, and I’ve briefly seen over 6A when testing a single cell in my Sky Ray King.

I have 6 Blazars in total, so I might run some additional tests myself. Perhaps you just got a bad cell or something. But a bad NCR18650A? That must be pretty uncommon.

Your Blazars are protected and put out over 5 amps?

Sure. That’s not uncommon for a good low resistance protection circuit. The Blazars are certainly not the only cells that can do it.

LAB
Offline
Last seen: 5 months 2 weeks ago
Joined: 07/28/2012 - 20:39
Posts: 90

I have some protected Eagletac 3100mah 18650’s that struggle to put out 3 amps. Fairly new also. It is why I use unprotected IMR’s mostly.

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia
LAB wrote:
I have some protected Eagletac 3100mah 18650’s that struggle to put out 3 amps. Fairly new also.

And you’re certain that it’s not your DMM that is doing the struggling? High resistance leads, and cheap inaccurate DMMs, are probably the true source of much of the woe regarding lower than expected current readings.

EDIT: Nevermind. If you can actually measure the superior performance of your IMR’s, I guess the variance is indeed in your cells.

LAB
Offline
Last seen: 5 months 2 weeks ago
Joined: 07/28/2012 - 20:39
Posts: 90

I took tailcap readings on a C8 and got 2.9 amps with the Eagletac 3100’s. With the IMR’s I get 4.5 amps.

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia

LAB wrote:
I took tailcap readings on a C8 and got 2.9 amps with the Eagletac 3100's. With the IMR's I get 4.5 amps.
Curious. You can find your cells reviewed on HKJ's site (in his battery comparator too) and his sample was certainly capable of putting out 5A.

 

LAB
Offline
Last seen: 5 months 2 weeks ago
Joined: 07/28/2012 - 20:39
Posts: 90

It seems like the protection circuit kicks in too soon on my Eagletac 3100’s. I use them in my flashlights that draw lower amps.

Thanks for the info.

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia


Generated by HKJ’s Battery Comparator

He obviously observed lower than expected performance as well it seems.

LAB
Offline
Last seen: 5 months 2 weeks ago
Joined: 07/28/2012 - 20:39
Posts: 90

I guess I need to get me some Blazars.

old4570
Offline
Last seen: 18 hours 12 min ago
Joined: 09/06/2010 - 02:44
Posts: 3316
Location: Land of Oz

MM is measuring Voltage – Measuring voltage is not an issue ..

I may need to look at the battery carriers – I did buy some new ones ..

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

Volk
Volk's picture
Offline
Last seen: 1 year 8 months ago
Joined: 03/07/2011 - 20:21
Posts: 264
Location: Sweden

Take a look at HKJ:s solution for his discharge tests, that clamp solution seems to work real good for him.

http://lygte-info.dk/info/Batteries2012Info%20UK.html

old4570
Offline
Last seen: 18 hours 12 min ago
Joined: 09/06/2010 - 02:44
Posts: 3316
Location: Land of Oz

Volk wrote:
Take a look at HKJ:s solution for his discharge tests, that clamp solution seems to work real good for him.

http://lygte-info.dk/info/Batteries2012Info%20UK.html

That looks interesting .. I made up a new heavy duty battery carrier , and the situation remains the same , very slightly lower resistance , maybe 0.03

. Variance between charger reported voltage and actual battery voltage remains almost 0.3v at 3A discharge …

So would be nice if some of you guys could check what your getting .. This is interesting , but I just dont have the time , exams next week , and I just did 11 hours of home work yesterday … Time is precious ATM But I just may need to set up a way to monitor Battery voltage during discharge so as to terminate at actual battery voltage rather than the voltage reported by the charger … So after my exams , I may run a whole bunch of 3A discharges …

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

old4570
Offline
Last seen: 18 hours 12 min ago
Joined: 09/06/2010 - 02:44
Posts: 3316
Location: Land of Oz
Ok here is a video …

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

cainn
Offline
Last seen: 5 months 2 weeks ago
Joined: 05/26/2012 - 13:45
Posts: 998
Location: Melbourne, Australia

old4570 wrote:
That looks interesting .. I made up a new heavy duty battery carrier , and the situation remains the same , very slightly lower resistance , maybe 0.03

. Variance between charger reported voltage and actual battery voltage remains almost 0.3v at 3A discharge …
So would be nice if some of you guys could check what your getting ..

My charger reads 0.02v high when monitoring resting battery voltage (confirmed with 2 different DMMs ). Taking this into consideration, I lose a total of 0.08v between the battery and the charger during a 3A discharge with the setup I am using (again confirmed with 2 different DMMs ).

Still trying to improve this.

old4570
Offline
Last seen: 18 hours 12 min ago
Joined: 09/06/2010 - 02:44
Posts: 3316
Location: Land of Oz

cainn wrote:
old4570 wrote:
That looks interesting .. I made up a new heavy duty battery carrier , and the situation remains the same , very slightly lower resistance , maybe 0.03

. Variance between charger reported voltage and actual battery voltage remains almost 0.3v at 3A discharge …
So would be nice if some of you guys could check what your getting ..

My charger reads 0.02v high when monitoring resting battery voltage (confirmed with 2 different DMMs ). Taking this into consideration, I lose a total of 0.08v between the battery and the charger during a 3A discharge with the setup I am using (again confirmed with 2 different DMMs ).

Still trying to improve this.

0.08v That looks rather good .. Im going to have to change the way I discharge , and go with what I have in the video , use a MM to keep an eye on battery voltage and terminate on what the MM say’s rather than trusting the Turnigy charger … My other MM measures to 0.000 if memory serves , so looks like some work ahead of me .

 Always remember , the easiest thing in the world to do , is to expel hot air from your lungs and through some vocal chords ..
The resulting sound may , or may not be worth listening too ….

 

Pages