Emergency Charge A Smartphone With A Battery, A Key And A Car Charger

If you're caught in an emergency, you can give your phone a little charge with a nine-volt battery, your house key, and a standard car charger.

At Instructables, user Ludvic demonstrates the simple procedure that allows a common household battery to give your phone a little juice. I was curious about the safety and effectiveness of the process, so I tried it myself. Sure enough, my phone's battery started to charge. Just plug your phone into the charger, hold the key to the contact on the side of the car charger plug, touch the end of the car charger plug to the positive side of the nine-volt battery, and touch the end of the key to the negative side.

It may not completely charge your phone's battery, but you should get enough power to make a quick emergency phone call. For more instructions, check out the link below.

Emergency Charge for Your Smartphone [Instructables]


    The question I have is: Where to get a nine volt battery in an emergency?

      From your smoke alarm, just hope your house doesn't catch fire :)

      Any smoke alarm will do. Always have a 9v backup battery even if they are hardwired smoke alarms.

    Why would I have a 9v battery, keys and a car charger but not a car? I very rarely have a 9v battery with me but quite often have my car within walking distance.

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