What is the better way to charge my iPhone

Use the adapter that came with the phone and plug it into and electric outlet. That is faster than charging using a computer.

Do:

1. Charge whenever you want
2. Charge as long as you want
3. You can use iPhone while charging
4. You cannot overcharge an iPhone with cable & adapter from Apple that came with an iPhone. It will auto shuts off when full.

Don't

1. Let it run < 20% too often
2. Let battery deplete (shorten battery life)