I bought this screwdriver as a replacement for the 3.6V NICAD driver that failed. This is a great palm sized driver that I use for mechanic work. It is small enough to get into tight spaces and it has enough torque to wrench tight 6 mm (M6) bolts. It has two speeds and these are 200 and 600 rpm. The 200 rpm speed is good for driving screws and nuts. The 600 speed is good for drilling small diameter holes. The battery life is okay, but as the battery drains the torque decreases and it will not break a setting of 19 (about 7 ft-lbs) This screwdriver has a click-to-hold chuck that is very beneficial for retracting the bit from the drilled hole. Overall this screwdriver is good for light duty drilling in household work. This tool also has a LED worklight that is very useful in low light; say, underneath a car!!The charger has a red light that goes out when the charging is complete. A charge takes 2-6 hours generally. I have used this driver alot in the last 10 months with no noticeable battery degradation. This tool comes with a great little case, that is useful to keep all the tools and bits together and will be very useful once the screwdriver is gone!!A very good buy. A removeable battery pack would make this a "5" palm sized drill/driver for light screw driving, drilling, and mechanic work.