Charging case flashing red with replacement battery

Hey there. I have already tried two new batteries for the charging case. They behave normal when connected like charging the earbuds or showing current battery stats in the app. But when I try to charge the case, the indicator LED flashes red and the battery won't be charged. This only happens with replacement batteries. If I connect the original battery, it can be normally charged.

I already tried resetting the headset, but it didn't solve the problem at all. Does anyone have a solution?

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