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

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thunderheart   100 W

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

Post by thunderheart » Feb 03 2019 12:22pm

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.
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The battery was bought from Queen Battery which is my reliable supplier of genuine cells 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 the battery was charged at standard charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hr 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).


Queen Battery QB18650 3000mAh

The cell's heat shrink tube shows brief specs but has no data about production date or batch number. It shows "3000mAh" mention next to the QB logo.
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The main specifications from Queen Battery QB18650-3000's datasheet:
Typical capacity: 3200mAh
Minimum capacity: 3000mAh
Nominal voltage: 3.7V
Standard charge current: 1.6A (0.5C)
Max charge current: 3.2A (1C)
Charge end voltage: 4.20V
Max continuous discharge current: 6.4A (2C)
Discharge cut-off voltage: 2.5V
AC impedance at 1KHz: ≤40mΩ
Weight: 47g

Measured initial DC IR at 3.2A in fully charged condition was 33.1±1mΩ

Measured weight of the tested cell was 46.15g
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QB18650 3000mAh capacity test results:
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The second 18650 cell from Queen Battery is designed to be discharged down to 2.5V not 2.75V like the 2600mAh one. At 0.2C capacity is slightly higher than 3000mAh. At 6.4A which is declared as its maximum discharge rate its capacity remains close to 2900mAh and the curve doesn't seem to have any signs of being close to the edge. I think the cell can handle higher discharge rates but i would not recommend to go over 5A in order to keep the cycle life in reasonable range.

High capacity and low price are the pros of QB18650-3000 but bear in mind that it's not a high drain cell. For applications like e-cigs or power tools it's not a good choice, but in a large battery pack with many cells in parallel groups it would be just in place.

Here is the video version of this review:
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Check out my YouTube channel for batteries, chargers and other stuff reviews.
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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

SlowCo   100 kW

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

Post by SlowCo » Feb 03 2019 12:35pm

Seems a nice choice but what is the price per cell?

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neptronix   100 GW

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

Post by neptronix » Feb 03 2019 1:17pm

That's around twice the internal resistance as a Samsung 30Q. :(
The QB is closer in power output to the ultra putzy 3.4ah cells, but without the capacity.

What's the price difference between a 30Q and this?
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Re: Queen Battery QB18650 3000mAh - real high capacity at low price

Post by 999zip999 » Feb 03 2019 1:52pm

Thank you for doing the testing. Do you need to keep separate two ground wires and the two pos wires or two more alligator clips for a four wire connection ?

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Marv1337n   1 W

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

Post by Marv1337n » Feb 03 2019 1:58pm

Why do you never mention the prices?
That's really the only argument for these cells so we'll need prices.

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

Post by dustNbone » Feb 03 2019 9:07pm


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SamRich   100 W

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

Post by SamRich » Feb 07 2019 2:05pm

dustNbone wrote:
Feb 03 2019 9:07pm
https://www.aliexpress.com/store/produc ... 19f7IBHIfO

Looks like $2.50 in lots of 100
Likely a bit less if you get a quote directly from Queen Battery. There was a significant difference in price for the 30Q ($3.45 vs $3.76 for 200 units SHIPPED to US) although I assume you get more protection buying through aliexpress...

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Honk   100 W

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

Post by Honk » Feb 07 2019 2:56pm

dustNbone wrote:
Feb 03 2019 9:07pm
https://www.aliexpress.com/store/produc ... 19f7IBHIfO

Looks like $2.50 in lots of 100
Sounds expensive compared to the proven longlife 29E.
Efficiency is king!

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Honk   100 W

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

Post by Honk » Feb 07 2019 3:03pm

999zip999 wrote:
Feb 03 2019 1:52pm
Thank you for doing the testing. Do you need to keep separate two ground wires and the two pos wires or two more alligator clips for a four wire connection ?
I don't think he has changed his test rig yet.
It's still the same 2 wire setup with the sens wires going to the clips and therefore measuring voltage drop between the clips and copper plates and also battery terminals to the plates.
The sag can be pretty extensive during high current tests at randomly bad surface connection.

But I would like to congratulate thunderheart on performing these tests. Strong good work.
Keep up the pace and set the bars high.
Efficiency is king!

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thunderheart   100 W

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

Post by thunderheart » Feb 10 2019 4:29am

SlowCo wrote:
Feb 03 2019 12:35pm
Seems a nice choice but what is the price per cell?
Marv1337n wrote:
Feb 03 2019 1:58pm
Why do you never mention the prices?
That's really the only argument for these cells so we'll need prices.
dustNbone wrote:
Feb 03 2019 9:07pm
https://www.aliexpress.com/store/produc ... 19f7IBHIfO
Looks like $2.50 in lots of 100
I don't sell batteries, i just test them. Last year i bought 40 cells for $1.4/cell as a part of a bigger order. They usually sell 200 or more cells at a time, so i don't think it's an actual price. Ask QB for an actual pricelist.
Honk wrote:
Feb 07 2019 3:03pm
I don't think he has changed his test rig yet.
I didn't change it but i have made a modified BF-2A fixture sent to me by Docware. The only problem resting is to find a way to attach copper terminals in a reliable way.
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: Queen Battery QB18650 3000mAh - real high capacity at low price

Post by cwah » 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
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

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Honk   100 W

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

Post by Honk » Feb 10 2019 4:09pm

cwah wrote:
Feb 10 2019 6:47am
For europe, ncr18650pf are still the best value for money it seems... Surprising after 5 years!
Third best in value for the 2900mA class I suppose.
#1: https://www.nkon.nl/rechargeable/18650- ... ah-e6.html
#2: https://www.nkon.nl/rechargeable/18650- ... 0-29e.html
#3: https://www.nkon.nl/rechargeable/18650- ... 00mah.html

thunderheart wrote:
Feb 10 2019 4:29am
I didn't change it but i have made a modified BF-2A fixture sent to me by Docware. The only problem resting is to find a way to attach copper terminals in a reliable way.
You could simply solder all measurement wires directly to the copper plates.
By that you get rid of the most prominent cause of sag as the highest resistance would be between the tiny clip teeth and copper plate.
Last edited by Honk on Feb 11 2019 1:45am, edited 2 times in total.
Efficiency is king!

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thunderheart   100 W

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

Post by thunderheart » Feb 10 2019 4:21pm

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?
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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