What is the one warning that absolutely no one follows?
Speaking from personal experience, it's that q-tips are not meant to be put in your ears.
Really, it says so on the box.
But a close second is the warning that the employee at your phone provider gives when they hand you a new smartphone: don't charge it overnight.
Do we listen? No way (at least I never have).
But should we? Absolutely, because how you charge your phone can make or break the battery.
Is overcharging a phone dangerous?
Some people get the idea in their head that you can charge a phone "past 100%," and that this is somehow dangerous.
This idea is wrong, but still pretty close to the truth.
Your phone will never "overcharge," and it's not dangerous to keep charging your phone once the battery reaches 100% - at least it won't explode or break.
But it's still a bad idea to charge your phone longer than you need to.
Is charging overnight harmful?
I use my phone as an alarm clock, so like most people I leave it plugged in all night long.
But this habit ruins your phone's battery life in the long run.
As soon as you turn on your phone for the first time, its lithium-ion battery and the lead acid case around it begin to degrade.
Charging overnight will just make your battery wear out even faster.
So if you want your phone to last for years, learn how to charge it the smart way.