Keep Your Smartphone Charged in a Power Outage
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As long as you remember to charge your laptop to 100%, you can use it as a charge with the USB port.
Keep the battery from draining quickly
iPhone: Settings - Battery - Turn on “Low Power Mode’
Android: “swipe down from the top menu and find the "Power Saving" icon.
If you have a newer model, you may have a built-in USB port. If not, you can use your lighter plug with a car charger.
External chargers are cheap enough at drug stores, or you can buy them on Amazon. Good to keep an extra handy, just in case.
If you still have power, but don’t want to charge your phone using a wall socket, try the USB port on your TV if you have one.