Do not charge the phone from a computer
With the USB-ports of your computer you can charge your smartphone at the workplace, for example. However, firstly, it will take longer time, and secondly, the voltage on the USB ports is constantly changing, and they emit a lot of heat. This may shorten the life of your battery. Studies have shown that the battery life could be reduced to 65% when heated to 40 degrees Celsius. Using the original charger with constant current is harmless to most of your battery.
Do not discharge the battery completely
Studies of the University of batteries (Battery University) have shown that for a constant charge to fall, for example, 2% battery life expectancy may be about 300-500 cycles. Moreover, if you bet on the smartphone when charging 25-50 percent charge before the battery is worn out, it may take 1000-2500 cycles. If you have about 30% of the charge, there is nothing wrong to recharge the battery.
Do not recharge the battery
Yes, nothing terrible is that you leave your phone recharged at night, no. It is comfortable and perfectly acceptable if you do not much care about the life of your battery. There is a small problem with reloading. It is associated with negative consequences contiguities lithium ions with crystals, and the more your battery, the more likely the contacts. Unfortunately, not so easy to remove the phone from the charging when it is charged only 80%. This was embarrassing to watch, and you can not be sure that you have enough charge for all day. However, such use would allow your battery last longer.