Search found 178 matches

by thunderheart
Oct 26 2018 6:14am
Forum: Battery Technology
Topic: New Samsung cell 33G
Replies: 34
Views: 6246

Re: New Samsung cell 33G

ABritInNY wrote:
Oct 26 2018 12:12am
It was listed as 16.5ah, I guess calculating them as 3300mAh, but Paul says 3150mAh so that's what it is and it's really just a 15.75Ah pack.
It's a 3.15Ah/6.5A cell.
SPECIFICATION OF PRODUCT.png
SPECIFICATION OF PRODUCT.png (102.74 KiB) Viewed 365 times
by thunderheart
Oct 20 2018 6:59am
Forum: Battery Technology
Topic: 12v power pack from 18650 cells
Replies: 2
Views: 248

Re: 12v power pack from 18650 cells

bikegeek wrote:
Oct 20 2018 12:57am
the output voltage if the imput voltage changes. I'm correct?
No, the output voltage should rest constant.
by thunderheart
Oct 19 2018 12:22pm
Forum: Battery Technology
Topic: SANYO UF103450PN capacity test
Replies: 2
Views: 262

Re: SANYO UF103450PN capacity test

Hi neptronix! I looked over your blog and think it's cool that you're testing out new cells and such. I decided to start a blog to make it easier to access all my tests. On forums they hang a day or two and then they are gone. One needs to use search and dig into the bunch of results. Blog is a good...
by thunderheart
Oct 19 2018 6:29am
Forum: Battery Technology
Topic: SANYO UF103450PN capacity test
Replies: 2
Views: 262

SANYO UF103450PN capacity test

Hi guys! I've previously tested prismatic 103450 batteries from Panasonic and Maxell made in Japan. This time i've tested the third cell from Japan - Sanyo UF103450PN. Like its competitors it's a low-drain Li-ion cell mainly used to power small devices and build battery packs. Queen Battery also off...
by thunderheart
Oct 15 2018 3:00pm
Forum: Battery Technology
Topic: Which battery chemistry for extreme climates?
Replies: 37
Views: 1503

Re: Which battery chemistry for extreme climates?

Lithium titanate seems to do OK at low temps This Russian guy did some garage tests of LTO cells in a small fridge. 9-l7-1J6te4 He found out that the temperature should be not lower than -15°C to keep the efficiency high. In case of -15°C you need to spend 10% of their energy to heat them up to mak...
by thunderheart
Oct 14 2018 6:47pm
Forum: Battery Technology
Topic: LG F1L vs Panasonic NCR18650B capacity test - the 3400mAh Li-ion cells' battle
Replies: 0
Views: 418

LG F1L vs Panasonic NCR18650B capacity test - the 3400mAh Li-ion cells' battle

Hi guys! Panasonic NCR18650B is probably the most popular Li-ion battery of 18650 size. Though it's rated at 3350mAh it's usually listed as 3400mAh on suppliers' sites as well as LG F1L. They are both 3350mAh cells with 4.87A maximum discharge rating so they must be compared. I've tested both cells ...
by thunderheart
Sep 15 2018 11:30am
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

)))))))))))))))))))))))))))))) You make me happy, dude)))))))))) I like you, definitely!))))))))
by thunderheart
Sep 15 2018 9:25am
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

Even if compare, say, 30T's result at 5A rate down to 2.5V and 2.8V the diffrence in capacity would be 0.988% and in energy - 0.709% (3006mAh/10641mWh @ 2.8V vs 3036mAh/10717mWh @ 2.5V)

0.7% in energy
I hope that 0.7% will make you happy :mrgreen:
by thunderheart
Sep 15 2018 5:44am
Forum: Battery Technology
Topic: LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?
Replies: 28
Views: 2369

Re: LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?

UPDATE: Queen Battery doesn't sell Samsung 36G due to its poor performance. It turned out they stopped selling them a month ago.
by thunderheart
Sep 14 2018 2:55pm
Forum: Battery Technology
Topic: LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?
Replies: 28
Views: 2369

Re: LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?

rojitor, thank you too, dude!

In fact it was the biggest disappointment for me... Especially the 36G... In M36 datasheet they didn't even mention the nominal capacity directly!
by thunderheart
Sep 14 2018 9:33am
Forum: Battery Technology
Topic: LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?
Replies: 28
Views: 2369

Re: LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?

DC IR test results done with EBC-A20 (5 iterations with 15-30s pause @3600mA)

M36:
28.6, 29.7, 31.1, 30.0, 28.9mOhm

36G:
31.4, 31.9, 30.8, 33.3, 30.8mOhm
by thunderheart
Sep 14 2018 9:30am
Forum: Battery Technology
Topic: LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?
Replies: 28
Views: 2369

LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?

The first 3600mAh Li-ion battery in 18650 format appeared 4-5 years ago. It was Panasonic NCR18650G. But it disappeared from the market very quickly and since then there was no 3600mAh cell you could buy (except fakes on eBay). Now two of top manufacturers, LG and Samsung, offer their cells, which a...
by thunderheart
Sep 12 2018 5:08pm
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

..... Above i listed some comparison with Lygte's results and the difference is -0,15% to 1.5% (while my tester's official accuracy is 1%) so talking about some "constant 5-10% lower results due to measurement setup" is just making me advertising simple calculators here. The Lygte 20A discharge tra...
by thunderheart
Sep 12 2018 3:20pm
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

liveforphysics Never wanted to offend anyone if ever did. I appreciate criticism and i heard nice ideas here but i don't accept when obvious things are turned over and presented as measurement error. Above i listed some comparison with Lygte's results and the difference is -0,15% to 1.5% (while my t...
by thunderheart
Sep 12 2018 2:57pm
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

Datasheet is available on Nkon shop. https://eu.nkon.nl/rechargeable/18650-size/lg-inr18650m36-3600mah-10a.html or direct link to download https://nkon.nl/sk/k/m36.pdf I have my M36 cell samples from them. I will run the test with your settings up to 10 A (limit of my calibrated tester) . By the wa...
by thunderheart
Sep 12 2018 2:16pm
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

thunderheart what discharge current test do you plan for M36 test? I would like to run the same settings to compare the results. From LG M36 datasheet the nominal charging current should be 1 A. Nominal charging cut-off is 50 mA (but our testers can do only 100 mA so I wil use 100 mA) and the nomin...
by thunderheart
Sep 12 2018 2:12pm
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

It seems as if you still don't understand that your setup measures 5-10% lower volt and Wh compared to others Samsung 30T at 5A: Lygte's result: 10,818Wh My result: 10,72Wh Difference: 0,90% For 10A, 15A and 20A discharge rates there is no energy mentioned to compare. LG HB6 at 5A: Lygte's result: ...
by thunderheart
Sep 12 2018 12:15pm
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

liveforphysics

Please stop trashtalking))) Nobody will spot weld wires to battery can :D just because you think that's the right way and all the other ways are producing misinformation. Just open a beer and have a nice time without masturbating on 0.0001% accuracy. :wink:
by thunderheart
Sep 12 2018 9:37am
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

Sony VTC6A and Samsung 20S? Hi. I've got vtc6, but not yet vtc6a or 20s. To create good data of the cell alone, you must take data from the cell end alone. Yeah, let's spot weld the copper wires to the cell end))))) And i must pay attention to the position of stars in the sky because with wrong sta...
by thunderheart
Sep 07 2018 9:03am
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

P.S.
My UNI-T UT61E's reading with shorted probes:
Image

And the resistance between the battery contact area and measuring point:
Image
by thunderheart
Sep 07 2018 8:46am
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

Lygte's results are not the only ones showing that difference.."mooch's" results on ecig that i posted are also the same as lygte....approx 10% higher voltage across the various cells i checked ! Regarding the HB4/6 tests, may well highlight the significance of the problem you have. Lygte's worst r...
by thunderheart
Sep 07 2018 5:42am
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

thats exactly 10% difference :wink: Again the same song))) I repeat for the 3rd or 4th time - how do you explain that lygte's tests show that HB4 is better and mine shows that HB6 is better? 10% difference?))))))))))) Higher resistance?)))))))))) The question is why there is 10% difference in volta...
by thunderheart
Sep 07 2018 1:55am
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

Thank you for your contribution, I think you are doing great. Nothing is absolutely perfect in this world. We need guys like you to help us with our decisions and to watch technology progression. Please keep doing the good work with other interesting cells like this :) ευχαριστώ, icherouveim :) Yea...
by thunderheart
Sep 07 2018 1:25am
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

Hillhater are you trolling me??? Look at these graphs http://www.imageup.ru/img40/3163831/battery-test-review-18650-comparator.png What do you see? HB4 is better than HB6. And the picture is the same at other discharge rates Now look at my results: https://ic.pics.livejournal.com/thunderheartrev/715...
by thunderheart
Sep 06 2018 6:06pm
Forum: Battery Technology
Topic: High drain 21700 - Samsung 30T discharge test
Replies: 60
Views: 3629

Re: High drain 21700 - Samsung 30T discharge test

I've already explained my testing procedure (IEC61960-2003 standard) and i don't think i should change it to get closer to someone's results. Also don't forget that there are no 2 absolutely identical cells. To understand that compare LG HB4 vs HB6 on lygte.dk with my results of the same models. htt...