Cordless drills provide many benefits over normal drills. There is no need for that big pile of mangled wires in the back of your truck. They are flexible, portable, and are the new industry standard. They used to be very expensive, but today everything is wireless so it is a must if you are a carpenter or handyman.
These large battery packs take up a lot of room and are pretty heavy, which adversely affects the fuel economy and the storage space in most hybrid cars. These batteries get their power from regenerative braking and/or from the gas engine. Also, they are very expensive, costing thousands of dollars to replace. Which is why they are guaranteed for the life of the car (read you warranty, some states make automakers guarantee the battery for 100,000 miles).
If you would rather prefer an entry-level dSLR, then you better get Nikon's D3100. It offers fast performance, superior image quality, and unparalleled control. It features live view, 1080p HD video, and a guide mode that is very user-friendly. It has a three-inch LCD screen, DX-format CMOS sensor, 1080p HD video, and is 14.2 megapixels. It uses a rechargeable lithium ion stocks ion battery as well as SD, SDHC, and SDXC media cards. Nikon D3100 is one of the lightest and smallest dSLR's available. It is the ideal camera for frequent travelers.
You can buy cheap cell phone batteries for any model. Every cellphone model has an appropriate cellphone battery that works best with these. But a cellphone battery from the same brand may not work with the other models.
When you store it, make sure the temperature is not too high nor too low. Don't freeze it and storing the unit in a hot car or near the radiator is a bad idea as well. Use a sealable bag, charge the Lithium battery stocks to about 50% and put it into the fridge between 0 and 5C.
OLithium-ion Batteries: these are the newest type of cell phone battery and, while having certain advantages over the older NIMH and NICD batteries, care must still be taken to ensure they perform at their best. For example, a new Lithium mines Ontario-ion battery should be "conditioned". What this basically means is that for the battery's first three charge cycles, fully charge the battery overnight and allow it to fully discharge before charging it again. This will increase the life and effectiveness of the cell phone battery.
The long wires of the LED are taped to the negative and positive sides of the coin battery (+) and (-). Carefully twist the wires, ensuring they won't touch each other, into a right angled position which will enable to the battery to rest flat against the inside cover of a glass jar. Tape the battery in place and screw on the jar.
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.