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

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thunderheart   100 W

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

Post by thunderheart » Mar 06 2019 4:14am

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.
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The battery was bought from my reliable supplier (Queen Battery) and tested with ZKETECH EBC-A20 and a self-made battery holder. It's a PC-connected battery tester supporting 4-wire measuring and discharging at up to 20A.
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I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals
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I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was 23.0-24.5°C. To be sure in results i've done each test minimum twice (usually 3-4 times).


Sony US18650VTC6

The cell is marked as
SE US18650VTC6 C6
G 0400743YF20U
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The main specifications from Sony VTC6 datasheet:
Rated capacity: 3000mAh
Nominal capacity: 3120mAh
Nominal voltage: 3.6V
Standard charge current: 3A (1C)
Charge end voltage: 4.20V
Max charge current: 5A
Max continuous discharge current: 15A (5C) / 30A (10C) with 80°C temperature cut
Discharge cut-off voltage: 2.0V / 2.5V
AC impedance at 1KHz: 8-18mΩ
Weight: 46.6±1.5g

The measured DC IR of fully charged cell at 3000mA was 15±1mΩ (measured using EB Tester Software).
My cell's weight was 46.83g
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Capacity test results
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High current curves are excellent, there is nothing to say. The only thing which seems strange to me is the 2.0V discharge cut-off voltage Sony uses at 0.2C. Why 2.0V? I think it's just to push the nominal capacity a bit higher because nobody gonna use VTC6 at 0.6A discharge rate. I can't find any other explanation for this.

Here is the video version of this review:
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Check out my YouTube channel for batteries, chargers and other stuff reviews.
I've launched my blog where you can find all my reviews in one place. Every new test/review will be first published on YouTube and in the blog. I'll be happy to see new subscribers, comments, suggestions and just your thoughts.
Yinlong LTO Lithium Titanate safety tests: https://youtu.be/eAUYbSDEy6I
Toshiba SCiB LTO Lithium Titanate safety tests:https://youtu.be/XsrRDZxEFQE

LG M50 vs Samsung 48G:https://youtu.be/KGJDogOG4zw
LiFePO4: QB26650 2500mAh 50A vs A123 ANR26650M1B: https://youtu.be/GOSkte11lRc

john61ct   1 MW

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

Post by john61ct » Mar 06 2019 10:03am

> The only thing which seems strange to me is the 2.0V discharge cut-off voltage Sony uses at 0.2C. Why 2.0V? I think it's just to push the nominal capacity a bit higher because nobody gonna use VTC6 at 0.6A discharge rate.

Well for longevity of course shouldn't be going anywhere near there.

At a lower current any given voltage will actually be at a lower (more destructive) SoC, less bounce-back recovery. Maybe they're figuring the longer cycle life from gentle low-current usage allows for harsher treatment in that one factor, as you say gives a false impression of greater capacity.

Where do these cutoff V specs come from?

Any idea which specific chemistry these are?

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Honk   100 W

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

Post by Honk » Mar 06 2019 2:10pm

Nice looking high drain cell but it probably has very lousy cycle life.
It would be nice to have Pajda or Flippy cycle test them at 3C drain to reveal their true nature.
High drain in all its glory but not at the expense of decent long life of at least 1000 cycles or more.

The specs of Sony VTC6 reminds about 30Q that has confirmed bad aging properties.
https://endless-sphere.com/forums/viewt ... 6#p1433642

It could be even worse if VTC6 behaves like GA at high drain.
https://endless-sphere.com/forums/viewt ... 0#p1447298
Efficiency is king!

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

Post by 999zip999 » Mar 06 2019 2:43pm

Honk which high drain cell do you recommend.

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

Post by NIPSEN » Mar 06 2019 3:06pm

Hi Thunderheart, thank you for your testing.
Will you test the popular LG INR18650HG2 from queenbattery.com.cn ?

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Honk   100 W

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

Post by Honk » Mar 06 2019 4:03pm

999zip999 wrote:
Mar 06 2019 2:43pm
Honk which high drain cell do you recommend.
I don't have any high drain cell recommendation.
Myself I just use the certified and proven 29E in enough parallel numbers to fit my needs.
Keeping the charge level at 4.1V, discharge at 1C and cut off above 3V will let the cell live far beyond 1000 cycles.
Perhaps it could last as many as 2500 cycles before hitting 70% remaining capacity.

https://endless-sphere.com/forums/viewt ... E#p1448895
https://endless-sphere.com/forums/viewt ... 5#p1410642
Efficiency is king!

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Matador   10 kW

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

Post by Matador » Mar 06 2019 6:29pm

999zip999 wrote:
Mar 06 2019 2:43pm
Honk which high drain cell do you recommend.
Id recommend samsung 40T 21700 cells... 4000 mAh and probably more reliable max 30A.

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Matador   10 kW

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

Post by Matador » Mar 06 2019 6:31pm

But if you want high drain and very high cycle life, nothing like the A123 cells.

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

Post by Matador » Mar 06 2019 6:32pm

Matador wrote:
Mar 06 2019 6:31pm
But if you want high drain and very high cycle life, nothing like the A123 cells. This is, of course if you don't mind lower capacity and a little weight. But Li titanate would be even more heavier... To much imho

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

Post by Honk » Mar 07 2019 11:30am

Latest 29E news: 500 cycles test. It simply rocks.
https://endless-sphere.com/forums/viewt ... 9#p1450053
Efficiency is king!

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

Post by thunderheart » Mar 18 2019 3:49am

john61ct wrote:
Mar 06 2019 10:03am
Where do these cutoff V specs come from?
Datasheet
NIPSEN wrote:
Mar 06 2019 3:06pm
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(
Matador wrote:
Mar 06 2019 6:31pm
But if you want high drain and very high cycle life, nothing like the A123 cells.
Exactly! I'm in love with them.
Yinlong LTO Lithium Titanate safety tests: https://youtu.be/eAUYbSDEy6I
Toshiba SCiB LTO Lithium Titanate safety tests:https://youtu.be/XsrRDZxEFQE

LG M50 vs Samsung 48G:https://youtu.be/KGJDogOG4zw
LiFePO4: QB26650 2500mAh 50A vs A123 ANR26650M1B: https://youtu.be/GOSkte11lRc

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

Post by john61ct » Mar 18 2019 11:59am


thunderheart wrote:Datasheet
Link please.

Personally I think even a 3V cutoff would be destructive.


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

Post by john61ct » Mar 18 2019 12:00pm


thunderheart wrote:
Matador wrote:
Mar 06 2019 6:31pm
But if you want high drain and very high cycle life, nothing like the A123 cells.
Exactly! I'm in love with them.
Do you guys mean any of their non-LFP models?

If so which? Links would be appreciated.


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

Post by john61ct » Mar 18 2019 12:02pm

Again, anyone have any idea which specific chemistry these VTC6 are?

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

Post by Addy » Mar 18 2019 1:25pm

john61ct wrote:
Mar 18 2019 11:59am
Personally I think even a 3V cutoff would be destructive.
Here's a link to the datasheet: https://keeppower.com.ua/download/01-20 ... mation.pdf

What makes you think that 3V cutoff would be destructive?

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Matador   10 kW

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

Post by Matador » Mar 18 2019 7:30pm

john61ct wrote:
Mar 18 2019 12:00pm
thunderheart wrote:
Matador wrote:
Mar 06 2019 6:31pm
But if you want high drain and very high cycle life, nothing like the A123 cells.
Exactly! I'm in love with them.
Do you guys mean any of their non-LFP models?

If so which? Links would be appreciated.
I meant the nanophosphate LFP cells. For cycle life hard to beat LFP.... But if you want the absolute most crazy power dense LPF... Then there is the A123 AHR18700 F1 KERS. These cells are used in EV F1 cars I heard they are around 100$ per cell though... But can deliver 60A continuous per 18700 cell. That is just crazy!

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

Post by Hillhater » Mar 18 2019 9:27pm

Matador wrote:
Mar 06 2019 6:31pm
But if you want high drain and very high cycle life, nothing like the A123 cells.
There are competitors.....
Saft have a 6a cell that is rated for 100C continuous (250C burst..thats 1,500 amps ! :shock: ), and 5000 cycles at 100% DoD.
http://www.houseofbatteries.com/documents/VL6A.pdf
But yes, its a bit bigger ! :wink:
This forum owes its existence to Justin of ebikes.ca

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

Post by thunderheart » Mar 19 2019 2:01am

john61ct wrote:
Mar 18 2019 11:59am
thunderheart wrote:Datasheet
Link please.
Sony VTC6   a 3000mAh 30A monster in 18650 size   Endless Sphere.png
Sony VTC6 a 3000mAh 30A monster in 18650 size Endless Sphere.png (42.08 KiB) Viewed 778 times
Matador wrote:
Mar 18 2019 7:30pm
I meant the nanophosphate LFP cells.
Me too
Yinlong LTO Lithium Titanate safety tests: https://youtu.be/eAUYbSDEy6I
Toshiba SCiB LTO Lithium Titanate safety tests:https://youtu.be/XsrRDZxEFQE

LG M50 vs Samsung 48G:https://youtu.be/KGJDogOG4zw
LiFePO4: QB26650 2500mAh 50A vs A123 ANR26650M1B: https://youtu.be/GOSkte11lRc

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

Post by john61ct » Mar 19 2019 7:40am


Hillhater wrote:Saft have a 6a cell that is rated for 100C continuous (250C burst..thats 1,500 amps ! :shock: ), and 5000 cycles at 100% DoD.
Apparently NMC/Graphite, similar to Tesla's newer chemistry?

No one knows what the OP cells are?


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

Post by john61ct » Mar 19 2019 7:51am


thunderheart wrote:I meant the nanophosphate LFP cells.

Me too
Me three 8-)
Addy wrote:What makes you think that 3V cutoff would be destructive?
Well there's no hard bright line between "damage" and "harmful to longevity".

3V is my zero %SoC on LFP, doing actual load testing you can see the actual useful capacity drawing lower than that is insignificant, so even for rarely-used testing & maintenance protocols I don't go lower than that on production cells.

Of course the makers spec lower, they're happy for you to only get rated cycle lifetimes or less 8-)

Looking at the various other LI chemistries, it seems their whole SoC vs Voltage relationship curves generally just shift upwards, not radically change the slop of the curves.

Therefore going any lower than 3V is IMO "relatively destructive " and should only be done when needed for rarely-used test / maintenance protocols

and likely even a bit higher of a 0%SoC V floor is called for in daily use cycling

for those wanting to get maximum lifespan.


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