Hello, first of all thank you very much for this detailed guide! Wishing to change my battery, I wanted to know whether or not it is an original battery (the one seen in the video). Because on many merchant sites, I saw that there was the mention "hb...ECW" on the battery tab. However, on the one I received and the one in the video, there is no mention of "ECW" on the tab. Do you know what that means? It's the only detail that seems to differ....
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