I am an commercial electrician, an have used a good variety of tools. The only tools that seem to stick around for more than two years are the dewalts. The new Nano batteries are a huge benefit. No longer does the drill slowly loose power causing you to switch out the battery pre-maturely causing a short cycle, and shortening the life of the battery's life.
Yes they do just "Shut Off" That is to protect the battery. Once a Li-Po battery gets bellow 3.2volts per cell it will damage the battery. So the tool shuts off to protect the battery, and your investment. Because a Li-Po battery gives almost full output the entire length of the charge you will not hear the drill getting tiered and slow. Also Li-Po's can be charged at anytime of its cycle, and it will not hurt the battery. Li-Pos are supposed to have 300 complete cycles in them before run times get shorter. Only time will tell.
This is a great all around tool and investment. I highly recommend it!
Get more detail about DEWALT DCX4230 18-Volt Lithium Ion Cordless Hammerdrill / Impact Driver Combo Kit with NANO Technology.
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