Win7 computer charging problem

friends who use notebooks know that although some sellers blow you up, say what computer power can last for 7 or 8 hours, but really use it, up to 3-4 hours At the time, some computers are even worse. There are warnings when there are less than 2 hours. How should the computer power supply of win7 32-bit system be used? The following small series will explain the specific problems for everyone:
First, does the power supply really need to use up the electricity and recharge it?
Many friends say this, the notebook power supply needs to be recharged after the power is used up, otherwise the power supply is not good, and the computer is even worse. So is this statement really correct? In fact, the current power supply is a lithium battery. The lithium battery uses the latest technology. In fact, the problem of the buffer effect has been completely overcome. In terms of life, the life of the lithium battery is mostly Fixed, it will not be worn out because of poor charging, as everyone knows, or it can be used for a longer period of time.
Second, do you need to pull out the battery when using the computer under charging?
A lot of friends have heard of this statement? In the case of natural charging, we need to pull out the battery when using the computer, then this statement Is it correct? Actually it is not right. As we have already said, the batteries used now are all lithium batteries. After charging, they will be automatically disconnected and will not accept the injection of electricity. Therefore, even if the battery is not pulled out, it will not What effect on the computer.
Three, how to charge is good for the power supply?
If it is really said that the most power is good, we should pay attention, do not wait until the power consumption is 0%, then recharge, so the pressure on the battery will be very Large, in general, charging will be more appropriate when the battery power is 20%-30%.