Step 1: Connect the portable charger’s cable to iPhone charging port.
Step 2: Charging will start automatically. Monitor progress on the iPhone lock screen.
Step 3: When iPhone shows 100% charged, disconnect the portable charger cable.
Step 4: The portable charger will recharge your iPhone battery multiple times before needing its own recharge.
Step 5: Recharge the portable charger by plugging it into AC power when battery gets low.