Thing is all cells react a bit different. It may have been that the cell with 0.5Ah had more heat on itself during the life or whatever? It can also be that that one died some cycles earlier than the other? Who knows? If you want to test feel free to do so
I agree that if 1 cell is close to 0.5 the others may be too. But in general i see that the ones in parallel always come close to each other. At the same time i have seen cells fail in packs just weeks old... With that said there is many factors.
As i said i have not seen anything that clearly states xxx follows yyy. In the beginning they may be.. But not in the end. Same goes to many things out there. Because we are using packs that are in their end of life we need to expect that some are worse than others. I have had batteries people said "those are unusable and dead" that i have been using on other appliances for years.. And that was people working daily with them.
For instance i was on one place the other day... This is horrible because they made me angry...
Women hand in her phone and asked why her battery time is so low.
Tech guy answers: Look here at this chart. As you can see you have xxx time left on a charge. this equals to 490 charge cycles. Your battery only last 500.
Women:But i only have owned this for 6 months! Can i do something not to cause this or prevent this
Tech guy: Yes you can. Always do full cycles.. Because every time you set the phone in your charger it counts as 1 cycle.. No matter if you charge 1minute or 2 hours.
Women: But but we always charge in our car and so.
Tech Guy: Stop with that. Charge once a day at most!
This is bullshit! We all know that Lithium batteries has most cycles in middle of its SOC... To bad such people can continue to work on such places.
That guy totally blindly looked at his chart and had no clue on how it works in real life. They only wanted to sell the service to her to change the battery and then instructed her with false.
Yes some chargers do more harm than they should but its not about what he told that women. I actually told here how it actually works after when we went out of this shop.. unfortunately i could not yell at him because its a place i tried to get batts from
Naturall death.. Yes and no. Many batteries dies due to that the electronic dies... Thats also a factor and then you might find good cells. But at the same time it differs if the pack had been stored somewhere for another year and then you might end up with a pack with all cells at around 1V.....
With that said if the cells never have been abused ie they are in the normal area they most likely will act the same. But if BMS or 1 cell fail we do not have that normal usage any more.. And they will start differ.
Yes i have tested them in place too. And i have also tested them free with same busbar approach. Since they blow due to the heat generated the soldered busbar takes away alot.
Im using 35AWG thinned fuse wire rated to 5A. In real life thats more like 6-12A depending on how its mounted.
Power consumed is something i also have calculated in another thread here. Dont find it now but we are talking about 0.1% wasted energy or around. I did an error in that calculation based on wrong length. I calculated with 5mm but i actually have ~10mm in avg.