In bespeak to fee a cellphone (or any battery),you require to carry out a circulation of fee particles(current) with enough driving pressure (voltage).

You are watching: How to charge your phone with a watermelon

A wall surface socket or USB port provides a steadycurrent at a typical voltage but any kind of current withenough voltage will charge your phone.

Certain fruits and also vegetables can be a source ofcharged particles, specifically squishy ones withlots the minerals, salt or acids. Citrus fruitslike lemon or grapefruit job-related best, yet you canuse potato too. Watermelons might work butdon’t have actually as numerous minerals/salts/acids together alemon, in spite of being a enlarge fruit.

Charged particles on their own are not enough –which is why her phone doesn’t charge if girlfriend plugit directly into a lemon. Yes no steering force(voltage) because that the charged particles to circulation intoand the end of phone. One method to use voltage is touse two various metals to connect your call tothe fruit. For example, the difference in energybetween copper and also zinc will develop a voltage of~1.1V, a small less than a AA battery. When stuckinto a fruit, the charged particles relocate away indigenous zinc and toward the copper, i m sorry causeselectrons native the copper come pass v yourphone to the zinc. This circulation of electrons(current) has actually enough control force tocharge your phone.

Any YouTube video clip that insurance claims you can charge yourphone using only a cold watermelon is afake, but fruit-based batteries space real. Thesecret isn"t the choice of fruit – the the choiceof metals you use to do the connection.

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Answer 2:

I have to answer this in two parts: thewatermelon battery itself and also some practicalconcerns.

The very first part is around the watermelon itself.Yes, that is feasible to attract electrical powerthrough a watermelon by transforming it into a battery.To do a battery, we should put two metalelectrodes inside an electrolyte(battery acid), then attach the electrodes by aconductive wire. For example, one of theelectrodes deserve to be zinc (like top top a galvanized nail)and the other can be copper (like a penny). Thewatermelon offers the electrolyte, watermelonjuice.

The electrical power the this batterygenerates does not actually come from thewatermelon. Instead, it originates from a pair ofchemical reactions that happen when all of thebattery parts are connected, referred to as reduction andoxidation (or together, redox, because that short). In ourexample, the oxidation reaction pulls twoelectrons turn off of a zinc atom, resulting in zinc ions todissolve in the watermelon juice. The reductionreaction bring away the electrons and combines themwith two hydrogen ion from the juice come makehydrogen gas. Together, these 2 reactions moveelectrons indigenous the zinc electrode with the wireto the copper electrode, make electricity.

Now because that the second part, the practicalconcerns. You could not be surprised to hear thatcommercial batteries are much an ext powerful thanwatermelon batteries. Lock use far better combinationsof electrodes and also electrolyte to generate muchmore electricity. Come get enough power for youriPhone to also detect, you would more than likely need afew watermelon batteries linked together inseries. Finally, there is the inquiry of what theiPhone itself will certainly do once it detects thewatermelon battery.

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If the power resource is nota great match, the phone might be able to block itto defend itself.