Test/review of Samsung INR21700-30T 3000mAh (Gray)

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HKJ
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Test/review of Samsung INR21700-30T 3000mAh (Gray)

Samsung INR21700-30T 3000mAh (Gray)
DSC_8691
Official specifications:


  • Standard discharge capacity: min. 3000mAh (1.5A charge 0.1A cut-off, 0.6A discharge, 2.5V cut-off)
  • Rated discharge capacity: min. 2650mAh (4A charge 0.1A cut-off, 10A discharge, 2.5V cut-off)
  • Nominal voltage: 3.6V
  • Charge voltage: 4.2V
  • Standard charge: 1.5A charge 0.1A cut-off
  • Rated charge: 4A charge 0.1A cut-off
  • Max. continuoys discharge: 35A at 25°C
  • Discharge cut-off voltage: 2.5V
  • Cycle life: 250 cycles to 60% at 35A discharge.
  • Cell weight: 69.0g max
  • Cell dimension: Height: Max: 70.40mm, Diamter: max. 21.22mm
  • Operating temperature (surface): Charge 0°C ~ 50°C (Recommended
  • Storage temperature: 1 month: -20°C ~ 60°C, 3 months: -20°C ~ 45°C, 1 year: -20°C ~ 25°C

Samsung%20INR21700-30T%203000mAh%20(Gray)-info
This is the new battery size that is slightly larger than 18650 cells. This cell is a high current cell with moderate capacity.
DSC_8690
DSC_8692 DSC_8693
DSC_8694
DSC_8695
Samsung%20INR21700-30T%203000mAh%20(Gray)-Capacity
This battery can easily handle 30A and more with constant capacity and perfect tracking between the cells.
I did try a 50A discharge, but my battery holder melted before I was finished with the first trace.
Samsung%20INR21700-30T%203000mAh%20(Gray)-Temp-20.0
Samsung%20INR21700-30T%203000mAh%20(Gray)-Temp-30.0
The battery gets warm at 30A, but not too warm.
Samsung%20INR21700-30T%203000mAh%20(Gray)-Temp-40.0
In this discharge the battery is in free air, i.e. it has better cooling.
Samsung%20INR21700-30T%203000mAh%20(Gray)-CapacityTimeHours
Samsung%20INR21700-30T%203000mAh%20(Gray)-CapacityTime
Samsung%20INR21700-30T%203000mAh%20(Gray)-Energy
Samsung%20INR21700-30T%203000mAh%20(Gray)-PowerLoadTime
Samsung%20INR21700-30T%203000mAh%20(Gray)-TripCurrent
Samsung%20INR21700-30T%203000mAh%20(Gray)-Charge
Conclusion
This battery is a very good battery and the best high current cell I have tested to date. At lower current there is no reason to use this cell, only when the current is above 10A is this cell interesting.
Notes and links
The batteries was supplied by ENERDan for review.
My test stations is only equipped to handle up to 30A, this means higher current must be done on other equipment.
How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Compare to 18650 and other batteries
Compare to 26650 and other batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Edited by: HKJ on 03/24/2017 - 13:38
Beachlogger
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Is this the same battery as a 30Q only bigger?

HKJ
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Beachlogger wrote:
Is this the same battery as a 30Q only bigger?

If it had been exactly the same, the capacity would have increased due to the size increase.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

chouster
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Thanks for the test HKJ. Impressing cell!

sac02
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Quote:
I did try a 50A discharge, but my battery holder melted

I spit water on my keyboard when I read this.

SubLGT
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Quote:
At lower current there is no reason to use this cell, only when the current is above 10A is this cell interesting.

Comparing it at 20A and 30A to its high current 3Ah 18650 peers like the Sony VTC6 and the Samsung INR18650-30Q, the big advantage seems to be much cooler operational temperatures. I don’t think any of the 18650 cells can be safely used at over 18A-19A in continuous use. Looks like the INR 21700 can be safely used at 25A for continuous use. The e-cig guys will be loving this 21700 cell.

HKJ
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SubLGT wrote:
Looks like the INR 21700 can be safely used at 25A for continuous use. The e-cig guys will be loving this 21700 cell.

It can be used at safely at 35A as long as it have free air around it (A metal holder can be very close to free air) (It did not get too hot in my 40A test). That is the reason I call it the best high current cell I have seen.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

sac02
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I did not know if you meant “best” high current cell compared to only 18650, or to any cell – so I looked up Liitokala INR26650-50A and the 30T performs much better at high current. Very impressive.

cabfrank
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Very impressive indeed. If the next generation includes higher capacity, sort of like the change from the 25r to the 30q, they will be really amazing.

HKJ
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sac02 wrote:
Quote:
I did try a 50A discharge, but my battery holder melted

I spit water on my keyboard when I read this.

I hate it, it means I have to do some extra work.

A new battery holder looks like this:

But I change the connecting wires and this means when it looks like this I have work to do:

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

KawiBoy1428
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WOW this 30T is one serious battery, thank you for testing and um…

Sacrificing!! Shocked

KB1428 “Live Life WOT

itsonlyme
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Nice cell. That’s an interesting battery holder. Did you buy it or make it? Any links if you bought it please?

hIKARInoob
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sac02 wrote:
Quote:
I did try a 50A discharge, but my battery holder melted

I spit water on my keyboard when I read this.

Samsung 30T’s motto: “HKJ’s equipment can’t handle my power.”
How’s that for advertising?

ferongr
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Probably the best e-bike cell it seems. Unless you have an underpowered EU-compliant motor.

Tom E
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Incredible! I want one!! Or 20! Excellent job once again HKJ!!

SubLGT
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ferongr wrote:
Probably the best e-bike cell it seems. Unless you have an underpowered EU-compliant motor.

Samsung introduced their 21700 e-bike battery in 2016: 4750mAh and 9A max discharge.

sac02
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SubLGT wrote:
ferongr wrote:
Probably the best e-bike cell it seems. Unless you have an underpowered EU-compliant motor.

Samsung introduced their 21700 e-bike battery in 2016: 4750mAh and 9A max discharge.

Wow, 4750 and 9A. That does seem like an ideal e-bike cell – lots of capacity and just enough current. What size / form factor?

HKJ
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itsonlyme wrote:
Nice cell. That’s an interesting battery holder. Did you buy it or make it? Any links if you bought it please?

It is from fastech: https://www.fasttech.com/products/1425/10024652/5339401

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Lopan
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sac02 wrote:

Wow, 4750 and 9A. That does seem like an ideal e-bike cell – lots of capacity and just enough current. What size / form factor?

Cylindrical, 21mm diameter and 70.0mm hight. In case that was the question.

Enveck
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Where in the world can I order these cells? I’ve been using the Sanyo 20700B, but I really want to get my hands on those. Any info or links would be greatly appreciated.

hIKARInoob
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Enveck wrote:
Where in the world can I order these cells? I’ve been using the Sanyo 20700B, but I really want to get my hands on those. Any info or links would be greatly appreciated.

Welcome to the club Enveck! Perhaps alibaba? I don’t know about shipping and stuff, I just googled this. https://www.alibaba.com/product-detail/Sam-sung-3000mah-40A-3-7V_6066868...

Cheers!

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Mooch tested and is using the 30T, just asked him where he got the cells. 

 

The Light Innocent I am

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Enveck
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Thanks, all I’ve found so far is Alibaba…. I guess they haven’t hit state side just yet. Working on getting an order thru Alibaba right now.

snakebite
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if the resistance that made all that heat were eliminated the test could be more accurate.
btw i rebuilt some versapak sticks with the 30t and they have a slight edge torque wise over the 25r.

PERMABattery
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SubLGT wrote:
ferongr wrote:
Probably the best e-bike cell it seems. Unless you have an underpowered EU-compliant motor.

Samsung introduced their 21700 e-bike battery in 2016: 4750mAh and 9A max discharge.

Yeah, Samsung INR21700-48G, supporting maximum discharging current at 9.6A, maximum pulse discharge current at 35A for 10 Seconds, 25A for 30 Seconds, and 18A for 60 Seconds. The nominal voltage is 3.6V, charging voltage is 4.2V. We are working on a new e-bike battery pack with just this Li-ion 21700, will come back here once there is any update. Smile

Custom Battery Pack Solutions

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Barkuti wrote:

Mooch tested and is using the 30T, just asked him where he got the cells. 


 


From the same company ….
Enerdan ….

WalkIntoTheLight
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Interesting. I was wondering what was the point of 21700 cells, when they are heavier and larger than 18650 but with no more capacity. It looks like high discharge is the answer!

I wonder if they have better cold-weather performance, too? For electric cars.

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WalkIntoTheLight wrote:
… I was wondering what was the point of 21700 cells…

WalkIntoTheLight, there's really no point other than the one thought by their creator/designer at Tesla Motors. Battery pack assembly cost reductions, among other reasons.

It's not the cell format what makes a cell good, but the technology and expertise which goes by it. There is a 18650 cell with this sort of high discharge technology inside or thereabouts.

However, this sort of high discharge cell technology isn't really needed for a vehicle unless you need a racing car or it's battery pack is too small. For a more normal vehicle lower discharge (C rating) cells are fine. As long as your battery pack can comfortably output the average maximum power draw of its associated electric motors and electronics everything is fine.

 

Cheers Party

The Light Innocent I am

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WalkIntoTheLight
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Barkuti wrote:
However, this sort of high discharge cell technology isn’t really needed for a vehicle unless you need a racing car or it’s battery pack is too small.

I was wondering if high-discharge cells perform better in cold conditions, than regular cells. If, for example, a high-discharge cell would suffer from less voltage sag in -20 degree weather, it might be useful in an electric car for winter conditions. Then again, I think they heat the batteries anyway, so maybe it’s not necessary.

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WalkIntoTheLight wrote:
Barkuti wrote:
However, this sort of high discharge cell technology isn't really needed for a vehicle unless you need a racing car or it's battery pack is too small.
I was wondering if high-discharge cells perform better in cold conditions, than regular cells. If, for example, a high-discharge cell would suffer from less voltage sag in -20 degree weather, it might be useful in an electric car for winter conditions. Then again, I think they heat the batteries anyway, so maybe it's not necessary.

 

For flashlights and especially headlamps this is an important aspect. High-discharge cells are much better in the cold compared to high-capacity ones! See here (in German).

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There are also batteries with high capacity, and a high C-rating rate.

Samsung 5300mAh 10 – 15A
Samsung 4000mAh 20 ++ A
Sony Vxx 5000 mAh 20 ++ A
Panasonic / Sanyo 21700 xxxxmAh xxA

There is a future of this magnitude.
The technology of these batteries seems to be superior to the 18650 in many areas.

We will see them in the future …..

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