Hi!
I recently purchased some A123 ANR26650M1B cells from HK.
The cells delivered did not match the picures shown to me when ordering. There is no A123 logo, and the model number says "ANR26650" instead of "ANR26650M1B".
According to some info I found, they maybe be real A123 cells but B-grade. Rejected samples from the normal production line, not within specifications, and sold without warranty.
I filed a complaint to the seller, who claims that the cells are A-grade because B-grade cells have no barcode. He also claims that after A123 went bankrupt, virtually all cells on the market are without A123 logo.
I tested the cells and they deliver the stated capacity of 2.5Ah. Current handling is difficult to test due to the extreme currents over 100A.
Does anyone know what these cells are?