Battery

Andrez02 Said:

"Battery: My battery is at 84% should I be concern or is that still okay to continue using or should I replace it ?"

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Getting a New Battery:

I'd be a bit concerned, and would keep a good eye on it every-so-often. Apple recommends you get a new battery, when the Battery Health reaches 80% or less. When it hits that 80% or below mark --then it is time for a new battery.

Generally 80% is considered the threshold, but you may replace your battery whenever you like, at your cost.

iPhone Battery Repair & Replacement - Apple Support