The LiitoKala 26650-50A/Lii-50A is quite singular. Made by chinese OEM Power Long Battery, there's no other 26650 cell in the market which can be effectively used to fake it without being easily noticed. Features a distinctive 4-lobe flat top and it is wider than any other cell in the market besides own Power Long Battery cells (∅≈26.7mm).

Both the Shockli IMR26650 5500mAh and the KeepPower IMR26650 6000mAh UH2660 are rewraps of the PLB INR26650-55A. Those chinese rewrapping fellows must think prefixing a battery with IMR is good, but this has nothing to do with the actual chemistry of the cells and I believe it is misleading. The OEM names their cells INR, and their actual chemistry is hybrid Nickel-Cobalt-Manganese.

Cheers ^:)