Do not leave your cell-phones for charging overnight.
This is a complete myth. Modern-day chargers are built so that when the phone has finished charging it will automatically stop the charging of the battery. So you need not go all paranoid trying to save the battery of your phone by switching it off in the middle of the night.
Do not discharge your phone battery to 0%
An entire cycle of your cell-phone is from 0% to 100%. So you must discharge your phone battery to 0%.
Experts also say that your phone works better at a charge between 40% to 80%.
It is okay to keep your charger plugged in, when not in use.
I understand that it is way more convenient to leave your charger plugged in condition. However, then you may run a huge risk of fire due to unprotected electricity.
Do not discharge your laptop battery to 0%
So the same case goes for your laptops.
Experts say you must discharge your laptops up to 0% once in a month. Take care not to overheat your laptops. Tech experts have found that it is in many cases the fault of the users that their gadgets fail and not the charger.
Modern day technology can pretty much take care on their own. If they just get a little help from you. So don’t go all paranoid if you left your phone for charging too long.