Phone Battery Charging Myths Busted


(upbeat music) – [Narrator] Charging your
cellphone is something you of every day, but are you
doing it the right way? How much should you charge it? Should you leave it plugged in overnight? Should you let the battery
go down to zero percent? And finally, will you phone just burst into flames at 2 a.m. while you’re sleeping because you’ve overcharged the battery? Don’t panic! Let’s debunk some battery
charging myths once and for all. Charging my iPhone overnight
will overload the battery. (penalty sounds) Smartphones are smart enough
not to let that happen. Once the lithium ion
battery reaches 100 percent, charging stops. However, if you leave
it plugged in all night, it’s going to use a bit
of energy constantly trickling new juice into
the battery every time it falls to 99 percent. That’s gonna eat into
your phone’s lifespan. Don’t worry too much about this. Plug in your phone while you sleep. If you happen to wake up
in the middle of the night, then unplug it. You can also plug it into a smart plug and schedule it to turn off. The trickle charge can
cause some heating up. Many experts recommend
taking the phone out of the case to charge overnight. At the very least, do not stack a bunch of crap on to of a charging device. And for the love of
Jobs, don’t sleep with it under your pillow they way
James Bond sleeps with his gun. – [Paris Carver] Tell me
James, do you still sleep with a gun under your pillow? – [Narrator] If you’re afraid of fire, some in the UK recommend
leaving the charging device on a dish or saucer whilst plugged in. I should freeze my phone to
prevent battery problems. (penalty sounds) Lithium ion batteries hate two things. Extreme cold and extreme heat. Repeatedly charging a
phone in subfreezing temps can create a permanent plating of metallic lithium on the battery
anode and heat is no better. Your phone is a computer,
and computers and heat are mortal enemies going back decades. Leave your phone sitting
in the sun while you work on your base tan
by the pool and it’ll throw you a warning that
it needs to cool down. And finally, don’t put it in the freezer! That’s just dumb. My battery should always
drop to zero percent. (penalty sounds) Running your phone until
it’s dead every time is not the way to go with
modern lithium ion batteries. Don’t even let it come
close to zero percent. That’ll wear out the
battery faster than normal. Batteries are on borrowed
time from the get go! The insides are in a
constant state of decay, and over time, they’re simply going to hold less and less power. The best thing to do is
plug in the phone when it’s between 30 and 40 percent. My battery develops a memory. (penalty sounds) That was a problem back in the days of older nickel cadmium batteries. Today’s lithium ion batteries
degrade and lose their capacity but not memory. A new phone will hit a
full charge in the same amount of time an old phone
will get to 82 percent. This is called “old man syndrome.” And fast charging makes
corrosion happen even faster. So, stop worrying about memory! If you’re gonna charge overnight, just don’t fast charge. Of course, if you plan to
swap phones every year or two, charge it any way you
want, as often as you want. For more battery tips, go to PCMag.com.

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