Search found 211 matches

by thunderheart
Mar 18 2019 3:49am
Forum: Battery Technology
Topic: Sony VTC6 - a 3000mAh/30A monster in 18650 size
Replies: 19
Views: 1603

Re: Sony VTC6 - a 3000mAh/30A monster in 18650 size

Where do these cutoff V specs come from? Datasheet Hi Thunderheart, thank you for your testing. Will you test the popular LG INR18650HG2 from queenbattery.com.cn ? Maybe. Gonna change my city soon so i think i will have to make a pause in testing( But if you want high drain and very high cycle life...
by thunderheart
Mar 06 2019 4:14am
Forum: Battery Technology
Topic: Sony VTC6 - a 3000mAh/30A monster in 18650 size
Replies: 19
Views: 1603

Sony VTC6 - a 3000mAh/30A monster in 18650 size

Sony US18650VTC6 (or just VTC6) is a high drain 18650 size Li-ion cell which supports discharge rate up to 15A if no temperature control is used and up to 30A with 80°C temperature cut. https://ic.pics.livejournal.com/thunderheartrev/71546108/241648/241648_original.jpg The battery was bought from my...
by thunderheart
Feb 25 2019 5:06pm
Forum: Battery Technology
Topic: Sanyo UR18650AA - low drain 2250mAh cell's capacity test
Replies: 0
Views: 262

Sanyo UR18650AA - low drain 2250mAh cell's capacity test

Sanyo UR18650AA has neither high capacity nor high maximum discharge rating but it's a relatively low-priced cell which makes it attractive. (Ask suppliers for a pricelist. I'm not a seller))) https://ic.pics.livejournal.com/thunderheartrev/71546108/234486/234486_original.jpg The battery was bought ...
by thunderheart
Feb 25 2019 4:58pm
Forum: Battery Technology
Topic: Panasonic NCR18650G - the mysterious 3600mAh battery's capacity test
Replies: 8
Views: 1049

Re: Panasonic NCR18650G - the mysterious 3600mAh battery's capacity test

Significantly different results to other tests on the same cell.. https://lygte-info.dk/review/batteries2012/Panasonic%20NCR18650G%203600mAh%20(Green)%20UK.html Yep. The cell i've tested showed the results i published. And the difference gonna be even more if we take .dat file and calculate the res...
by thunderheart
Feb 21 2019 2:43am
Forum: Battery Technology
Topic: Panasonic NCR18650G - the mysterious 3600mAh battery's capacity test
Replies: 8
Views: 1049

Panasonic NCR18650G - the mysterious 3600mAh battery's capacity test

Panasonic NCR18650G is a famous Li-ion cell which appeared in 2014 and very quickly disappeared. It had (and still has) the highest capacity rating in 18650 format. https://ic.pics.livejournal.com/thunderheartrev/71546108/233281/233281_original.jpg The battery was bought from my reliable supplier ( ...
by thunderheart
Feb 16 2019 3:21am
Forum: Battery Technology
Topic: Samsung 33J - a 21700 Li-ion battery designed for Tesla
Replies: 8
Views: 1170

Re: Samsung 33J - a 21700 Li-ion battery designed for Tesla

But, it also highlights the compromises that are forced by the limits of current Li technology ! :| :? I just don't understand why Tesla uses these cells and not Boston-Power Swing 5300 or A123 Systems' ANR26650M1Bs (or other LiFePO4 cells). Swing 5300 does 3000 cycles at 80% DOD and 2000 cycles at...
by thunderheart
Feb 15 2019 8:59am
Forum: Battery Technology
Topic: Samsung 33J - a 21700 Li-ion battery designed for Tesla
Replies: 8
Views: 1170

Re: Samsung 33J - a 21700 Li-ion battery designed for Tesla

Why would Tesla want this cell over their existing 4.8 Ah cell , or even the 3.1-3.3Ah , 18650's they already have access to. ? Only Tesla's guys know the answer I think. But if they buy this they need this. I call your bluff. Where does it say it was "designed" by Tesla? Did i say "it was designed...
by thunderheart
Feb 15 2019 6:33am
Forum: Battery Technology
Topic: Samsung 33J - a 21700 Li-ion battery designed for Tesla
Replies: 8
Views: 1170

Samsung 33J - a 21700 Li-ion battery designed for Tesla

Samsung INR21700-33J is neither a high drain nor a high capacity cell but it's a very interesting battery thanks to its impressive cycle life. It's designed for Tesla and is ideal for using in big battery packs. https://ic.pics.livejournal.com/thunderheartrev/71546108/231126/231126_original.jpg The ...
by thunderheart
Feb 13 2019 2:38am
Forum: Battery Technology
Topic: LG M36 vs Samsung 36G capacity test - 3600mAh or just marketing?
Replies: 28
Views: 3837

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

Very interesting and surprising results! Thanks a lot, Pajda!
by thunderheart
Feb 10 2019 6:54pm
Forum: Battery Technology
Topic: Samsung 15M - high drain 18650 cell's capacity test (1.5Ah, 23A)
Replies: 0
Views: 254

Samsung 15M - high drain 18650 cell's capacity test (1.5Ah, 23A)

Samsung INR18650-15M is a 1500mAh Li-ion cell of 18650 size which supports continuous discharge at up to 23A. It's a direct competitor for two 1500mAh high drain cells from LG i tested earlier - HB4 and HB6. https://ic.pics.livejournal.com/thunderheartrev/71546108/229591/229591_original.jpg The batt...
by thunderheart
Feb 10 2019 5:31pm
Forum: Battery Technology
Topic: Samsung 20S - high drain 18650 Li-ion cell's capacity test
Replies: 15
Views: 1121

Re: Samsung 20S - high drain 18650 Li-ion cell's capacity test

Pajda wrote:
Feb 10 2019 4:24pm
High energy Samsung 40T has far worse cycle life at 1C discharge rate than the high energy model 50E.
Based upon your tests or datasheets?
by thunderheart
Feb 10 2019 4:21pm
Forum: Battery Technology
Topic: Queen Battery QB18650 3000mAh - real high capacity at low price
Replies: 12
Views: 1035

Re: Queen Battery QB18650 3000mAh - real high capacity at low price

cwah wrote:
Feb 10 2019 6:47am
For europe, ncr18650pf are still the best value for money it seems... Surprising after 5 years!
https://www.nkon.nl/rechargeable/18650- ... 00mah.html
~$3/cell?
by thunderheart
Feb 10 2019 4:29am
Forum: Battery Technology
Topic: Queen Battery QB18650 3000mAh - real high capacity at low price
Replies: 12
Views: 1035

Re: Queen Battery QB18650 3000mAh - real high capacity at low price

Seems a nice choice but what is the price per cell? Why do you never mention the prices? That's really the only argument for these cells so we'll need prices. https://www.aliexpress.com/store/product/100pcs-lot-free-shipping-QB-18650-QB18650-3000mAh-battery-cell-3-7V-laptop-rechargeable-battery/133...
by thunderheart
Feb 09 2019 5:52am
Forum: Battery Technology
Topic: Samsung 20S - high drain 18650 Li-ion cell's capacity test
Replies: 15
Views: 1121

Re: Samsung 20S - high drain 18650 Li-ion cell's capacity test

SamRich wrote:
Feb 07 2019 2:22pm
I still have not found a better cell than the 30Q...
It's one of the best and most beloved cells))
by thunderheart
Feb 03 2019 12:22pm
Forum: Battery Technology
Topic: Queen Battery QB18650 3000mAh - real high capacity at low price
Replies: 12
Views: 1035

Queen Battery QB18650 3000mAh - real high capacity at low price

This is Queen Battery's second model in 18650 size and it's rated at 3000mAh. It's a low-drain (6.4A) cell with modest price tag so it could be ideal for using in battery packs. https://ic.pics.livejournal.com/thunderheartrev/71546108/228326/228326_original.jpg The battery was bought from Queen Batt...
by thunderheart
Feb 03 2019 9:54am
Forum: Battery Technology
Topic: A123 Systems ANR26650 Grade A vs Grade B - discharge test
Replies: 17
Views: 1617

Re: A123 Systems ANR26650 Grade A vs Grade B - discharge test

SamRich wrote:
Feb 01 2019 3:48pm
Does anyone know what is that opening/hole on the top? A vent?
Should be
by thunderheart
Jan 30 2019 2:15am
Forum: Battery Technology
Topic: Queen Battery QB18650 2600mAh - balancing between price and performance
Replies: 0
Views: 290

Queen Battery QB18650 2600mAh - balancing between price and performance

Queen Battery has two models in 18650 format and the first one is rated at 2600mAh. It's a mid-drain cell which can provide continuous discharge at up to 13A. https://ic.pics.livejournal.com/thunderheartrev/71546108/226928/226928_original.jpg The battery was bought from Queen Battery which is my sup...
by thunderheart
Jan 21 2019 11:15am
Forum: Battery Technology
Topic: Queen Battery QB26800 6800mAh 20A - the big guy!
Replies: 12
Views: 1590

Re: Queen Battery QB26800 6800mAh 20A - the big guy!

Thanks john61ct ! Under "Li-ion" i mean 3.6/3.7/3.8/3.85V Lithium cells but sometimes people refer to 3.2/3.3V LiFePO4 as Li-ion too. And I assume you're happy with that ZKETECH EBC-A20 ? Yeah, i am)) So what was the cost for this battery at today’s rates? Hi Tom! A guy bought 126 of them for $4.45 ...
by thunderheart
Jan 21 2019 10:32am
Forum: Battery Technology
Topic: Queen Battery QB26800 6800mAh 20A - the big guy!
Replies: 12
Views: 1590

Queen Battery QB26800 6800mAh 20A - the big guy!

26800 is a new format of cylindrical cells. It means 26mm in diameter and 80mm in length. Queen Battery QB26800 is rated at 6800mAh and can be discharged at up to 20A continuously. https://ic.pics.livejournal.com/thunderheartrev/71546108/225620/225620_original.jpg The battery was bought from Queen B...
by thunderheart
Jan 15 2019 1:07pm
Forum: Battery Technology
Topic: Samsung 50E capacity testSamsung 50E capacity test - 5000mAh or not?
Replies: 12
Views: 2203

Re: Samsung 50E capacity testSamsung 50E capacity test - 5000mAh or not?

BF-2A sad story - you always have some surprise, I am curious 😊 Unfortunately, it is not possible to get correct DCIR values with „EB Tester Software“ automatic „Resistance Test“. Neither the capacity and energy are calculated correctly. As i told you, the same data collected by EB Tester Software ...
by thunderheart
Jan 15 2019 7:31am
Forum: Battery Technology
Topic: Samsung 20S - high drain 18650 Li-ion cell's capacity test
Replies: 15
Views: 1121

Samsung 20S - high drain 18650 Li-ion cell's capacity test

Hi guys! Samsung INR18650-20S is a 2000mAh Li-ion cell of 18650 size which supports continuous discharge at up to 30A. https://ic.pics.livejournal.com/thunderheartrev/71546108/223413/223413_original.jpg The battery was bought from my reliable supplier ( Queen Battery ) and tested with ZKETECH EBC-A2...
by thunderheart
Jan 15 2019 7:15am
Forum: Battery Technology
Topic: Samsung 50E capacity testSamsung 50E capacity test - 5000mAh or not?
Replies: 12
Views: 2203

Re: Samsung 50E capacity testSamsung 50E capacity test - 5000mAh or not?

Hi Docware! Thanks a lot! I wish you and all of ES members lots of money to build big packs and safe operation. Let the fire burn in your hearts not in batteries!)) I've finished testing the BF-2A without modification and it's a sad sad story... I'll publish the results soon. It definitely needs to ...
by thunderheart
Jan 06 2019 7:57am
Forum: Battery Technology
Topic: Samsung 50E capacity testSamsung 50E capacity test - 5000mAh or not?
Replies: 12
Views: 2203

Samsung 50E capacity testSamsung 50E capacity test - 5000mAh or not?

Samsung INR21700-50E is a 21700 size cell which is being sold as 5000mAh one while in its official datasheet the capacity is mentioned as "Min. 4900mAh" and there is absolutely no "5000mAh" mention anywhere. https://ic.pics.livejournal.com/thunderheartrev/71546108/222475/222475_original.jpg The batt...
by thunderheart
Jan 06 2019 7:34am
Forum: Battery Technology
Topic: Samsung 40T - 35A 21700 Li-ion battery's capacity test
Replies: 13
Views: 1938

Re: Samsung 40T - 35A 21700 Li-ion battery's capacity test

Thunderheart, thanks for running these tests and sharing the data. :wink: I'm assuming the battery tester wires have a separate Kelvin connection inside the cable jacket terminating at the aligator clip. If that's the case, it's not horrible. It certainly could be better but it's only going to make...
by thunderheart
Dec 27 2018 6:48am
Forum: Battery Technology
Topic: Samsung 40T - 35A 21700 Li-ion battery's capacity test
Replies: 13
Views: 1938

Re: Samsung 40T - 35A 21700 Li-ion battery's capacity test

There is absolutely no misleading. Everything including equipment and holder is well described and showed. Misleading is when author hides something or lies.