The first rule you need to be familiar with when choosing a cordless drill is this simple fact-the battery you choose to power this tool will ultimately determine the strength and torque you will get. Obviously, the higher the voltage of the battery, the more power you can expect to get from your cordless drill. While this seems to be very exciting option, there are tradeoffs to be made with a higher voltage cordless tool. There is the burden of additional cost and additional weight if you are going for a higher voltage solution for your drilling needs.
This is the most basic of hand held power drills. It is a simple electric drill with one speed and one direction. It is mainly good for drilling holes in wood, metal, plastic, and soft metals. It is not the ideal choice of drill to use for applications such as driving screws. Since the speed is not variable and the drill only operates at a higher RPM, you would likely either strip the screw head or snap the head off the screw if you tried. You will not likely find many of these around today as their uses are rather limited.
Tesla Roadster first started selling in 2008. It has a price tag of $111,000, it is a two-seater sports car. It is based on the Lotus Elise with a fiberglass body. This car is a rocket, it can accelerate from zero to 60 in under four seconds. It has a range of 245 miles with a massive 53-kilowatt-hour battery pack. Full charge takes 3.5 hours on a proprietary 240-Volt 70 amp charger. It has a very stiff and jarring ride with a very basic interior. It is awkward climbing into the cockpit because of the tall wide sill. The loud battery-cooling fans emit a constant lithium stock roar behind you. Tesla is developing a lower cost $50,000+ model S sedan expected to be released in 2012.
Let's look at a typical comparison to prove this point. A normal 9.6 volt cordless drill will weigh around 3-1/2 lbs and costs you $35-$150 a piece, depending on the model and brand you choose. If you opt for a higher voltage tool, a 19.2 volt cordless drill would weigh up to ten lbs and costs anywhere from $120-$300 a piece. If you are looking to get more power and torque from a cordless drill, then it may justify the cost of getting a more expensive version. But if you are merely looking to drive screws in your own home, then it would not be a wise move to waste your hard-earned money on a powerful 19.2 volt cordless drilling. It is much harder to use too, because of the additional weight. Under these circumstances, a lighter version would suit you best.
For the most part, laptops do not come with batteries with extended life periods. For example, the typical laptop Lithium battery stocks will only last around an hour or so, which leaves you little to no time for work or communication while on the go, unless you happen to be nearby a place for charging. Then it kind of defeats the purpose of a laptop for most people anyways. The laptop is supposed to be mobile. In order to make your laptop fit your lifestyle best, you will need to make sure you look for high quality laptop batteries.
Now yes, it depends on how you're using it. But the Apple creators say it will play movies solidly for hours for example before the Lithium mines Ontario iPad battery says feed me".
Battery memory affect is the length of time a battery will work before it needs recharged. The battery 'learns' such period of time through how you use it. If you repeatedly use your laptop for one hour and then charge it, its battery will learn to stay strong for only one hour. Using a Lithium battery and using it until it is almost dead and then recharging it will greatly increase the period of time that the battery will stay strong. Please make sure to read the manufacturer owners manual to also find out more about the battery life.
Of course, there will be Apps. Smart phones right now are all about the apps. You need to do a bit of search. This is necessary since the right apps will help you and nasty ones will just be a liability and will eat up your space. There are also paid and free apps so if you really want to make the most out of your smart phone use, check out the options and invest on good ones.