What are LiFePO4 battery cells grade? Why there is a B mark on the battery cell?

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This video demonstrates what is a B mark cell and the 3 types of cell grades.
How to decode the cells' QR code↓
B Mark Code Decoder link:
Intact QR Code Decoder link:
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Good luck! Stay with them! I wouldnt buy!😂

Sam-yvze
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They make them look more realistic everyday from the mannerisms to the eye and lip movement.

ndestate
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The face expression is little bit disturbing/frightening. Alien like eyes

candro
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Wait. Is that even a real girl? Or some animated doll?

jec_ecart
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your very pretty, but it is VERY VERY difficult to understand your english and I speak with 100's of Chinese & vietnamese every day. Maybe u need to adjust your microphone, get better microphone, speak louder or slower or add sub titles to your video....Your english is very good...but some issues with the sound quality.👍

overthetopcargotrailerjerr