In this video, I put the Ampace JP40 cell to the test with a continuous discharge at 40A. We’ll go through the performance metrics, including voltage, current, power output, capacity, and temperature changes during the discharge cycle.
Test Details:
Initial Voltage: 4.14V
Test Mode: Constant Current (CC)
Discharge Current: 40A
Key Metrics:
Voltage: The cell started at 4.14V and maintained a stable voltage profile throughout the test. The minimum voltage recorded was 2.5V under load.
Current: A consistent 40A current was drawn during the test, highlighting the cell’s ability to handle high discharge rates.
Power: The power output peaked at 144.21W, demonstrating the cell’s capability to deliver substantial power.
Capacity: The total capacity utilized during the test was 4084 mAh, showing the efficiency and performance under high-drain conditions.
Temperature: The maximum external temperature recorded was 59.4°C, indicating excellent thermal management and stability.
Summary:
The Ampace JP40 cell performed exceptionally well under continuous 40A discharge, maintaining stable voltage and temperature levels. This test showcases the cell’s robustness and reliability for high-drain applications, making it a suitable choice for demanding projects.
Test conducted by: Nelvick Berrios
Please subscribe to my channel.
For a detailed breakdown and further insights, make sure to watch the full video!
Just saw a post on the VESC group confirming that Austin at 18650-21700 sent these over. Do you know where he is sourcing them? The only place I have found to buy them is Alibaba and I don’t really trust those cells yet.
For anyone interested, the guys over on the Torque Test Channel compared packs built with these cells, using a high torque impact wrench on a calibrated precision torque dyno. I wont give up the comparative test result here, but its worth watching if you are considering buying some JP40’s.
Here is another test I performed on the JP40 cell, draining the maximum current it can provide—108A, from a single cell.
In the video, I also conducted the same test on a Molicel P42A.
The ampace JP40 seems to be the best high-drain 21700 in the world currently. I have watched a lot of tests, and it beats every single competitor. Sadly, you can’t get hold of any in europe yet.
Will be nice if anybody share experiences. I want to share the last video testing with the new Attorch high current holder with my DL20EW tester at 40A CC. Check the thermal performance of these cell and capacity at that load.
Pls check your 4-wire connection to the tester. (You can use an ordinary voltmeter for check, just connect its probes directly to the cell terminals and compare both readings under the load) Your measured voltage sag is too high for this cell, even at 10C@40A you still should be above 3.75V right after applying the load and get at least 13.6Wh with this settings.
I believe in this case is suffering from voltage drop since the device is made for only 20A. 40A probably is overheating and creating the sag. However, the sensing wires should not be affected for this. I need to see if the meter need calibration or upgrade the wires. Now I have a better option than this one for high current testing.
Pajada, I hear so much about you and Is my pleasure know you now. Thank you for your advice !!!
