I've finally bought another EBC-A40L and I'm currently testing the same cells I tested 15 months ago.
They have since been cycled 224 times.
I'm using the same logic as before: charge to 3.65V with cut off current of 5A, wait 30 minutes, discharge till 2.5V
Here is a comparison of my first retested cell
Time of test; Capacity; Energy
December '22; 278.4 Ah; 900.27Wh
March '24; 266.00 Ah; 855.91Wh
Capacity lost 4.4%; energy lost 4.9%
The only differece is that the first test was carried out at around 19deg (indoor) and the second one at around 15deg (garage).
Edit 19Mar2024
Second cell (#9) measured 266.90 Ah, 858.68Wh
So at the moment a pretty even loss across these 2 cells