Check your battery connections for any signs of corrosion as well as to make sure that they are not loose. If there are loose connections then there is not going to be a proper flow of power. You should check these connections every time that you open the engine compartment. If your battery itself is not clean and dry, you will loose some of your battery's energy.
While you are checking the connections, take a little bit of time to make sure that the battery itself is actually clean and dry. If it is not, then go ahead and clean it. Unless your battery is one of those sealed types, then you are going to need to check the fluid level. If the battery fluid level is too low or even dry, then you need to fill it. When you fill the fluid level make sure that you do so with distilled water. As a battery gets older, it tends to lose its charge. On the average, a battery is only good for about four to four and a half years. If your battery falls within that range, then you should take the expedient measure of getting a new one.
If you cannot keep your car in a garage and you live in a very cold climate then you should take advantage of battery heaters. These things can be plugged into your home electrical outlets, help keep your battery from freezing and are going to cost you between $20.00 and $250.00 depending on the type that you purchase (from car.tips.net)
Check out the other Bruce Bernhart RV Websites and Blogs:
Also, be sure to check out the Bruce Bernhart Mandolin Websites:
Bruce Bernhart on the mandolin family
Bruce Bernhart on mandolin bluegrass chords and patterns
Bruce Bernhart on temperature considerations
Bruce Bernhart lessson on mandolin flats and sharps
Bruce Bernhart lesson on scales, circle of 5ths and meter