Due to the popularity of the LiitoKala 26650 cells it may be possible that some AliExpress sellers are selling sub-par products: PLB factory rejects or even cells from another manufacturer. There is people reporting cells with different weight and capacity, even the top looks slightly different. Beware.
AliExpress does not have proper customer protection policies, at least not against li-ion cell fraud. It can be risky buying this stuff from there.
Look:
Good (blue) and bad (black). In HKJ's reviews (blue, black) measured cell weight was 95.3 and 95.7g, 0.4g more for the latter because of the sticker.
LiitoKala either went downhill or was bad to start with in this respect, or is being faked by AliExpress sellers. They've used/use the bait and switch tactic.
As an example, take a moment and see the actual cell prices other retailers ask for LiitoKala cells: FastTech and GearBest. The difference is huge.
volchyonok, my advice for you is to buy the Lii-40A cell, based on Lishen LR21700SA cells. Or get these cheap BAK 18650 rewraps. They're more than adequate for an e-bike, no problem with power output because your cell pack is big. Just be cautious and do your figures for up to 35W/cell with the Lii-40A/LR21700SA cells, and maybe ≈25W/cell for the EAIEP BAK 18650 rewraps. Better safe than sorry. Fraud with li-ion cell sales seems to be mostly focused on high discharge cells, thus one problem less for you.
If, for example, you aim to feed a 48V electric motor, plese bear in mind the actual voltage output from the battery reduces with load because of cell internal resistances. So, instead of 13S I would go 14 or 15S, depending on battery width too (number of cells in parallel).
For example, 90 pieces Lii-40A cells can be configured 15S6P, a pack which can deliver up to 3150W average guaranteed, thus going nicely strong for 1000 - 2000W of 48V electric motors and related electronics. Or 120 pieces of the aforementioned BAK 18650 cells in 15S8P.
The battery pack peak power output cannot harm the motors or electronics, they just make use of what they require. However, if your cell pack cannot deliver enough power output problems can arise.
Cheers :-)