Not a problem glad to help out. I’ll charge them tonight and post the voltage off the charger.
I have one spare 20r I can add. So I’ll do the hg2, 20r, and 25r. 20r and 25r are basically new under 10 cycles the hg2 probably around 50-70 cycles. I expect them to not drop much myself
i can tell you i have recycled a lot of efest cells.
most because they went to 0v.
a few due to dents.
most were from vapers that were suddenly having issues with a mod.
thinking it had failed somehow they were sent to me for repair.
seeing the batteries at 0v or at least 1 of them i would drop in some good ones and no more problem.
in a mod with a built in charger i was seeing very bad imbalance.
charged the purple efests and let them sit overnight out of the charger and mod.
they were worse the next day.like 4.1 3.9 4.21.
seems they rewrap whatever is cheap.
cant say that i have ever seen this with aw,samsung,sony,or lg.
Hey guys. That’s great. Thanks for the tests! I’m low on batteries right now(I think) but I’ll give a check tomorrow and see what I have. 
Think I can add a little support (like carrying water to the sea). Just started with 0.5A on:
Keeppower IMR 18350 750 mAh
Efest IMR 18350 700 mAh
Trustfire TR14500 900 mAh (don’t even smile, its way better than the next one on the list)
Nitecore 14500 750 mAh (NL147)
Windyfire IMR 14500 600 mAh
Keeppower 18650 3400 mAh prot
Olight 18650 3400 mAh prot (ORB 186P34)
Thorfire 18650 3000 mAh (BRC18650)
Samsung INR18650-30Q 3000mAh
Samsung ICR18650-28A 2800 mAh
Lumintop 18650 3400 mAh with USB charging
Klarus 18650 18GT-36 3600 mAh
Have not tried out the last two, but only if they can be charged in my OPUS.
And the Klarus is going to be a present to someone end of week 31
Yes, some of it is the same as yours, but I am sure that the absolute figures won’t be the same.
IMHO it is more about relative figures like: compared to my Samsung, my Klarus lasts xxx%.
Nice addition Henk!
After the two months I will end with a capacity test for each battery, to see if the amount of self-discharge correlates with a drop in capacity (I think it does).
I threw away a 30Q that was about 18 months old. It began self discharging to 0 volts in 3 weeks. It still worked fresh off the charger, but I did not trust it, so it is gone.
Wow only 18 months? How heavily was it used/cycled and what was the life like example ligjt draw like a power bank or 10+ amp draw flashlight.
Posting my voltages from my three batteries when I get back home. I wrote them down. Like djozz I will do a discharge on them. Once the two months is up
Add me to the test list too.
All charged at 0.5 A before measurement.
Keeppower 16340 (P1634C, 2015, black)
Mfg capacity: 700 mAh / 2.59 Wh
Charged voltage: 4.187 V
Measured capacity (0.5 A, 2.8 V): 752 mAh / 2.678 Wh
Olight 16340 (ORB-163C06, cyan)
Mfg capacity: 650 mAh / 2.4 Wh
Charged voltage: 4.180 V
Measured capacity (0.5 A, 2.8 V): 665 mAh / 2.336 Wh
Efest IMR 18350 (10.5 A, purple)
Mfg capacity: 700 mAh
Charged voltage: 4.185 V
Measured capacity (0.5 A, 2.8 V): 631 mAh / 2.307 Wh
Enercig 18350 (TN18350HP-700, grey)
Mfg capacity: 700 mAh
Charged voltage: 4.191 V
Measured capacity (0.5 A, 2.8 V): 688 mAh / 2.576 Wh
Btw, the Efest was the only one that lowered in voltage right before my eyes when I took the measurement.
I find the same thing. Been tossing some of the older ones regularly.
I have some 10440’s and 14650’s I can add but not ’til tomorrow.
No measurement, but I’ve got a 2 year old 14500 in an occasionally used light stored with a full charge and it still performs as if new. The 2 10440’s I rotate in my EDC (same vintage, spare always fully charged) seem to self-discharge some and have definitely lost some capacity.
Sad to see another once well-regarded name fall flat on it’s face.
Phil
I have had the same feelings …that lmr’s were dying faster than lithium cobalt .
my efests are pre-efest they came from bestinone .The 16340 orange lmrs have been dying with very few real usage ,where the old trustfire flames still keep plugging along .I think i tossed 3 out of 4 .
the blue 14500’s seem to be ok but the blue 18350’s don’t really seem to like the shorty A6 fet drivers ,
i also think I’ve seen Lg h4e batteries with less than the 4.20V that got shoved in them ,A cell losing voltage because of gremlins has never inspired confidence .
Glad to hear that this is not just my experience… No one ever promised that these cells would last as long as other chemistries . my guess is they don’t .
Update with the voltages shown by my OPUS after charging up until “FULL” with 0.5A on:
Keeppower IMR 18350 750 mAh = 4.17V
Efest IMR 18350 700 mAh = 4.17V
Trustfire TR14500 900 mAh = 4.19V
Nitecore 14500 750 mAh (NL147) prot = 4.15V
Windyfire IMR 14500 600 mAh = 4.19V
Keeppower 18650 3400 mAh prot = 4.18V
Olight 18650 3400 mAh prot (ORB 186P34) = 4.21V
Samsung INR18650-30Q 3000 mAh = 4.20V
Samsung ICR18650-28A 2800 mAh = 4.20V
Thorfire 18650 3000 mAh (BRC18650) prot = 4.20V
Lumintop 18650 3400 mAh with USB charging prot = 4.20V
Klarus 18650 18GT-36 3600 mAh prot = 4.21V
Apparently all can be charged in my OPUS.
The Klarus is going to be a present to someone end of week 31
Maybe one or two more, because birthday-season is starting 
Making li-ions rest/sleep at full spec charge conditions is known to damage the cells. My experience with laptop packs and a nearly all of the time plugged in the wall old BB Bold smartphone test confirms this.
I've said this before, it is best to store cells well below maximum charge voltage (3.92/4.2V max or 14/15th according to BU-808: How to Prolong Lithium-based Batteries). I even limit myself to this level of max no-load voltage unless I explicitly require a full fuel tank.
This is no joke and cell manufacturers know it: both the spec figures and the sales are bigger, the latter due to both the former and the undue overvoltage cell stress. Win - win situation lads and lasses.
Of course, everyone is free to believe as they wish.
Take care folks.
I charged the 20r on my opus it undercharges slightly. 4.13 off the charger.
The 25r and hg2 were charged together on my xstar vc2.
25r voltage. 4.20, hg2 4.19
All readings were taken with my dmm
I’ve started tests with:
banggood unbranded 26350 2000mah
Vappower imr26650 4200mah
30Q light pink wrapper
30Q dark pink wrapper
One of the 30q’s has tested only at 2200mah the other was 2800 both cells used for 1-2 or 3 charges at the most.
I’m thinking that I was given 40 fake 30q’s! I bought them to rebuild powertool batteries for my dad and some friends. I’ve had all kinds of trouble. The cells will not stay balanced and drop their voltage. The one tested is the last I have of that batch. Hmm…
I also will test a windyfire 14500, imr18350, and efest 10440.
I’ll post the starting voltages when I have the data.
I got a pair of 18500 EFest v2. Probably havent used or charged in a year or more, one was at 3.99v, and one at 4.02v
Checked a bunch of other cells ranging from 16340 to 18500 that havent been used in the same range of time, and lowest was 3.97v and highest was 4.07v
Edit: Just found a TFF 26650 that I forgot about, who knows last time thats had a charge. It is probably 3-4 years old or so. Was at 3.93v
Sorry… banggood unbranded:)
