Skip to main content

Queen Battery QB18350 900mAh 9A Li-ion cell's capacity test

I've tested cylindrical cells of different sizes - from 10440 to 28600, but it's the first time i've got an 18350 cell. Queen Battery QB18350 is a 900mAh cell rated at 9A max.
Queen Battery QB18350 900mAh 9A Li-ion battery's capacity test | Thunderheart Reviews

It has the same 18mm diameter as any 18650 cell but is 30mm shorter - the length is 35mm. Here it is together with a 10440 (AAA), a 14500 (AA) and an 18650 cell:
10440 AAA 14500 AA 18350 18650 battery size comparison
10440 AAA 14500 AA 18350 18650 battery size comparison

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.

I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals

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 25±2°C. To be sure in results i've done each test minimum twice (usually 3-7 times).


Queen Battery QB18350 900mAh

The heat shrink tube doesn't have much information on it. There is only the model number, nominal capacity and nominal voltage mentioned.
Queen Battery QB18350 900mAh 9A Li-ion battery's capacity test | Thunderheart Reviews

The main specifications from Queen Battery QB18350 datasheet (pdf):
Nominal capacity: 900mAh (at 0.5C discharge)
Nominal voltage: 3.7V
Standard charge current: 450mA (0.5C)
Max charge current: 900mA (1C)
Charge end voltage: 4.20V
Charge cut-off current: 9mA (0.01C) (100mA used)
Ambient temperature:
During charging: 0–45°C
During discharging: -20–60°C
Max continuous discharge current: 9A (10C)
Discharge cut-off voltage: 2.75V
Internal resistance: 80mΩ
Weight: 25g

Cycle life:
The capacity should be ≥80% of initial value after 150 cycles at 0.5C charge / 1C discharge or after 500 cycles at 0.5C charge / 0.5C discharge.

DC IR at 900mA in fully charged condition was 18.9±4.4mΩ (measured using EB Tester Software's Resistance test feature).

Measured dimensions: 18.2mm (diameter) × 34.9mm (length).

Measured weight: 23.9g.
Queen Battery QB18350 900mAh 9A Li-ion battery's capacity test | Thunderheart Reviews

Queen Battery QB18350 900mAh capacity test results:
Queen Battery QB18350 900mAh 9A Li-ion battery's capacity test | Thunderheart Reviews
Just look at the capacity at 0.2C/0.18A! It's more than 1100mAh!!! 27% higher than declared! Even at 2A discharge it's still above 1000mAh and at 5A - above 980mAh! Numbers seem to be excellent but let's look at the curves. I really don't like the 9A curve. The voltage sag witnesses that 9A is too much to be held by this cell and i'd not recommend to go over 5A.


Verdict

I'd call QB18350 an excellent 1100mAh/5A cell but not a 900mAh/9A one. 2.75V discharge cut-off voltage may cause problems if your BMS cuts off at 2.5V but in most cases we use 2.8 or 3.0V cut-off.

Here is the video version of this review:
Queen Battery QB18350 900mAh 9A Li-ion battery's capacity test | Thunderheart Reviews

Check out my YouTube channel for batteries, chargers and other stuff reviews.

Popular posts

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. 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. I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals I've  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...

Samsung 21700 battery battle: 50G vs 48G vs 50E

Samsung has a good lineup of 21700 Li-ion batteries and when i tested INR21700-50G i thought it would be interesting to test INR21700-48G cell too because the new batch of 48Gs came in green heat shrink tube (the version i tested before was gray). Then i added 50E results to comparison as they are very close in capacity and max discharge rate. The batteries were 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. 50G and 48G cells were tested using my battery holder v.4.0. A detailed video about it is available on my channel. 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 char...

Samsung 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". I've tested it to find out it's real capacity. 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. I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals 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). S...

3500mAh 18650 Li-ion cells' discharge capacity test (Sanyo NCR18650GA vs Panasonic NCR18650GA vs LG MJ1 vs Samsung INR18650-35E)

Hi guys! I’ve got four 3500mAh batteries from top manufacturers. I’ve tested and compared them. I think it’s interesting not only for me, but also for you, the guy who is reading this:) The cells were bought from Queen Battery , a Chinese supplier of genuine batteries, who specializes mainly on EV and eBike market. Queen Battery has a branch in Europe, but they also work with customers from Americas, Russia, etc… As always, I've 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. 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 current mentioned in its datasheet to 4.2V (cut-off at 0.1A, which is the lowest supported by EBC-A20). Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was 20-...

Samsung 40T - high drain 21700 Li-ion battery's capacity test

Hi guys! I've tested the Samsung INR21700-40T (35A) at up to 20A discharge (limited by my equipment). 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. I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals 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 23.5-24.5°C. To be sure in results i've done each test minimum twice (usually 3-4 times). Samsung INR21700-40T The c ell is marked as  INR21700-40T SAMSUNG SDI 2I15 which mean s that the production ...

Li-ion 21700: LG M50 5000mAh vs Samsung 48G 4800mAh discharge capacity test

Hi guys! I've tested two high capacity 21700 cells - LG M50 (5000mAh) and Samsung 48G (4800mAh). The latter i had already tested before and the re-testing of another cell showed almost no difference with previous test results. The M50 is a new cell which is being sold as 10A one, but in its datasheet the maximum discharge current is mentioned as 7.28A. Nevertheless i've also discharged it at 10A to look at it's behavior. The cells i've bought from Queen Battery . As always, I've 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. I've used the v2.5 of my battery holder 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 current mentioned in its datasheet to charge end voltage (4.2V) (cut-off at 0.1A, which is th...