Because the charging electric hand drill, well, he does not need the line, it can be easily carried, and it can also be said that if there is no electricity, you can use the flashlight drill for a use, especially at high speed, sometimes the line is not long enough, the electric hand drill is more frequent, more flexible, and then easier to operate, um, I don't worry about that wire twisting or losing power.
The charging hand drill is better than the plug-in because the charging drill is convenient to carry, even if there is no power supply, it can be used, the disadvantage is that the time is long, there will be insufficient power.
The charging electric drill is characterized by easy to carry, good operation for some corners or higher difficulty to use, not so laborious for construction personnel, after sufficient electricity, can be used anywhere without power, and is safe, a plug-in electric drill must have a fixed power supply before it can be used, compared with the charging, as long as there is electricity, sustainable use. Each has its own advantages and disadvantages,
dissimilar
12v or more than 12v can drill metal below 12v can only screw can adjust the speed advantage is that you can not shake the line or use light in the power failure if you buy an ordinary plug-in home on the line power is also large.
Home hand drills are generally better wired than rechargeable. Because the wire drill voltage stability power change is small, but not easy to carry; The rechargeable type is easy to carry and can be used where there is no power supply, but the power is greatly affected by the battery power.