I could be totally wrong about my understanding but I think phones and other devices “pull” the electricity needed to charge their batteries and if you plugged it into a wall plug that couldn’t supply enough juice it could damage the phone. I also hear people talk about some wall plugs charge their phone way faster so my question is can phones or other devices modulate how much they pull if they detect that a plug is capable of supplying more? Enlighten me people of the internet’s!
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The phones don’t “pull’ electricity, they more like “let it in”. You can imagine, that the phone have some kind of door that it can open or close to regulate how much electricity come in.
When the plug doesn’t have “juice” – nothing bad actually happen. Bad things happen, when the plug **does** have the “juice”, but something down the line cannot handle it and gets ripped apart. There are two things, that can fail:
* The phone may open the door too much, so the cable cannot handle a big flow of “juice”, heat up and catch fire.
* The plug may push “juice” so hard that phone’s door can’t hold it, it would get kicked open, and electricity would rush into the phone. The phone would die at best, explode at worst.
So, as you see, changing phone “intake” is dangerous, as it puts more strain on the cable. So, it’s usually the plug, that changes its “pumping strength”. Of course, it can only do so, if the phone agrees to it, so they do some negotiations over the cable.
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