Bought Macbook air 13 M2, brand new with 0% battery.

So I want some real opinions, should I worry or not.

If its battery health is "normal" then I would not be concerned: Get help with your Mac laptop battery - Apple Support. Letting the battery discharge to 0% just once isn't going to hurt anything. Leaving it in that state for a very long time (months) is a different story.

All batteries deteriorate with age regardless of how they start life. That deterioration is not predictable to any fine degree. Stop worrying about what might happen, us the man and enjoy it.

Or take it back and get a refund if within the return windows still. Your call.

Charge it overnight. If it takes the charge and the battery lasts as you'd expect, you're home free.

mrkirov wrote:

... but my mainly question was will this cause eventually problems in the future like lowering the battery life overtime, because of this.

No.

You really cannot draw any long-term conclusions based on how quickly a battery's capacity changes. It might drop precipitously from 100% to 95% (for example) only to stay at 95% for a long time. It might even go up a percent or two between charge cycles.

Of course the long term trend is down, but that eventual decrease in battery capacity does not occur as a linear function.

I do not disagree with your decision to return it within the vendor's return period. 30 days implies it was Amazon or some other big box retailer, so why not take advantage of it. If you want to be certain you are not buying a Mac that has been sitting in inventory for a while, buy directly from Apple.

If the battery health is normal there is nothing to worry about. Just charge it first for a prolonged period of time and you're okay

Understandable. I think you did the right thing by returning it, but don't be surprised if the next one was sitting in inventory for just as long. From what I can determine Emag Bulgaria appears to be reputable though.