You might ask "What is the 3V motherboard battery"? On the majority of PCs the motherboard holds a +3 Volt Lithium Battery which is used for two functions. Firstly it keeps the computer time updated. Secondly, on older PC's it keeps the BIOS settings (Low level start-up instructions) in memory.
Speed - you can have variable speed option in these cordless drills. You need to buy a drill which will provide you with the appropriate amount of speed that you want. Depending upon the speed you will be able to screw on things a lot quicker or even slower. So keep the speed in mind while buying it.
On top of a great battery, the Makita BDF452HW has a 2-speed transmission and a 4-pole motor that operates at up to 450 in. lbs. of max torque and 285 in. lbs. of PTI torque. This ensures you will have plenty of power for cobalt mine almost any job you need to accomplish. All you need to do is switch between the two transmission settings and you're good to go.
2) Battery freshness: often overlooked. Always make sure you have the freshest battery possible. A battery can lose it's ability to hold a charge as time goes on. You want batteries that move off of shelves quickly to be sure they aren't old.
The Lithium battery stocks-ion battery is light years ahead of the earlier batteries and considerably better than the Nickel-cadmium (Ni-Cd) or the nickel-metal hydride (Ni-MH) batteries which are still being used. These batteries are less expensive but the Li-ion batteries are far superior in three ways.
In case you are using new nickel-metal hydride (NiMH) battery, remember you should not charge the battery for too long or it will overcharge it and end up shortening the life of the battery. However, it is important to charge and discharge the battery three times just like the Lithium mines Ontario-ion battery to ensure that it has a long a life.
Some cordless impact drills are now using lithium-ion batteries which take a lot less time to get a full charge. For instance, I personally use a Makita 18V lithium-ion impact drill and it takes fifteen minutes to charge as opposed to my standard 18V Dewalt drill. The Makita is also equipped with a built-in LED light for illuminating areas with little to no light. The LED light feature in particular is one of my favorites.
Another one of the best drills out there is the Panasonic EY7540LN2L model. It makes fastening jobs a cinch. It is lightweight, and ergonomic. It is extremely easy on the wrist and hands, so it is comfortable to use. It has long lasting lithium batteries for longer jobs. It is an impact driver, and is definitely versatile. It costs more than the other two drills, but it is still one of the best. Overall, any of the drills mentioned above would be a great cordless drill to own.