Ebat battery review
In this quick article i will show the result of the tests of the Ebat batteries I have done. Links in bottom of page.
Equipment and test scenarios
- Icharger Duo 308 for testing capacity
- Flir I7 to meassure the temperature of the cell
- Logger on PC for below graphs
All discharge tests done on the icharger have the max Volt set to 4.2V and low cut off at 3.0V. Current cut off is set to 10% of the max. Tests done for capacity wise was done with 0.2C as mentioned on their webpage
Last test was done with the Opus BT-3100 at 1A.
Info (Links in bottom
Battery 1 & 2 are the 2500mAh battery with max continous discharge at 20A
Battery 3 & 4 are the 2900mAh battery with max continous discharge at 15A
Battery 5 & 6 are the 5000mAh 26650 cells.
| Ebat | |||||||||||||
| Battery | Init volt | Stated capacity | Cap test C | Capacity test mA | Capacity 1 | Capacity full load | Temperature (C) | Capacity Opus@1A |
Weight on webpage |
Meassured weight |
ptc/cid | bounce back volt | Temperature During test |
| 1 | 3.545 | 2500 | 0.2 | 500 | 2380 | 2475 | 73 | 2580 | 50 | 45 | yes | 3,12 | 20 |
| 2 | 3.551 | 2500 | 0.2 | 500 | 2445 | 2470 | 85 | 2530 | 50 | 45 | yes | 3,12 | 20 |
| 3 | 3,526 | 2900 | 0.2 | 580 | 2718 | 2783 | 74 | 2886 | 46 | 45 | yes | 3,14 | 20 |
| 4 | 3,530 | 2900 | 0.2 | 580 | 2832 | 2803 | 76 | 2870 | 46 | 45 | yes | 3,13 | 20 |
| 5 | 3,83 | 5000 | 50 | 95 | yes | 20 | |||||||
| 6 | 3,81 | 5000 | 50 | 95 | yes | 20 |
Below is all graphs collected. Both the normal one and the full 20/15A tests done.
Cell 1 0.2C Discharge
Cell 1 Full load (20A)
Cell 2 0.2C discharge
Cell 2 Full load (20A)
Cell 3 0.2C Discharge
Cell 3 Full load
Cell 4 0.2C discharge
Cell 4 Full load (15A)
Conclusion
Pretty darn impressive results! Even though I only ran through full tests on the first 4 cells they did perform.
All 18650 Cells did perform both capacity wise and current wise. The capacity was around or close to the said capacity. The max current also worked out but you need to beware of that they will reach 80C easily! Their rated nominal current is pretty low but on the other hand no heat came with running them at 1A.
If the number of cycles will be correct that they state (500+cycles) im not sure about. Neither did they have numbers regarding the SOC for the number of cycles
The price on them are very competitive!
Negative things i did find was that they did not have any datasheet on their webpage and the pages did differ from each other.
26650: The capacity was around 5Ah as stated. No issues here but I did not test the max current draw on them.
Would I buy them if i need/got a good offer? Yes I would.
Links:
Battery 1 & 2 – 2500mAh 18650 battery
Battery 3 & 4 – 2900mAh 18650 battery
Battery 5 & 6 – 5000mAh 26650 battery
