Just yesterday my keyboard and mouse really went out on my Acer Aspire 4530 laptop. It is still under warranty and hopefully I can get it fixed or get a different computer but today that computer says that there is no battery detected. I unplugged my computer and it shut off. Not only that but some time ago my Crystal Eye webcam stopped working. My huge worry is the batter, how long is the average life of a laptop battery? Should I need a new one now?

Generaly, laptop batteries lose about 15% of their charging capacity per year. Fortunately, you can buy refurbished spare batteries with a 1-year warranty at a fraction of the price of a new. Keeping a fully charged spare handy will lengthen the life of both batteries.
Depends on how you use the machine and the settings you use. A year is no real surprise. I get about 2 years.