Is it alright if I didn't fully charge my iPhone 6s for the first time?

Is it alright if I didn't fully charge my iPhone 6s for the first time? - 2

Added (1). I Just bought my new iphone 6s, the salesman told me to fully charge my phone, not 8 hours, but fully charge after it drops 20%. Unfortunately I plugged in my phones to my laptop to restore backup then the phone charged until 40% and i unplugged it. After the battery drop to 20% and I fully charged it. Is it going to affect anythin

That's an old battery myth. They are modernised to the point of not needing to do that

80% is enough, do not over charge.

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