No problem. It may just be the nature of this charger/analyzer (Lii-500). It consistently indicates lower capacity figures on all cells I test with it by about 5-6%.
The chart they posted (see below) shows them measuring capacity using various current levels, starting with as low as 0.5A and going up to 8A. At 0.5A, their tested capacity is 812mAh. The main difference is their cutoff voltage is 2.5V. Mine is 2.8V, but there can’t be much capacity left there at that point.
Notice that the “begin volt” is 4.198V. This is almost impossible to achieve even with cells fresh out of the charger, I assume they must have set the termination beyond 4.2V in order to start the test at such high voltage. Probably around 4.25-4.3V.
With the MC3000 you get an option of “d reduce” which is the equivalent of a reversed CV phase for discharging, maybe with a termination current low enough along with the high starting voltage the 800mAh+ capacity can be achieved.
When people say down to 2.5/2.8V do they mean under load or not? No one seems to make the distinction but i’m pretty sure it makes a not insignificant difference depending on the rate.
U took the words from my fingers
Thanks for the test CRX!
Mine should be arriving next week, and I’m looking forward to use them Thanks to Vapcell :partying_face:
Cool :THUMBS-UP:
These tests give a better real life usage perspective on performance rather than just testing the cells in a discharge rig.
The results differ in every run due to temperature etc except the lower level regulated runs.
I must admit seeing it like this makes me start leaning towards regulated drivers more as opposed to just FET driven.
Different cell but here's the FW3A started on Max for comparison too.