Laptop Battery Guide
Laptop  batteries are a common topic of discussion, and the vast majority of questions about them deal with prolonging their lives. There is a lot of information about Lithium Ion (hereafter Li-Ion) batteries to wade through. There are a lot of misconceptions floating around as well. This simple guide addresses the most common laptop  battery questions and concerns.
How long will my laptop battery last?
Your laptop  battery will clock began ticking the moment it was assembled. The elements inside your battery slowly react with each other, eventually rendering the battery unable to supply the required power to your notebook. In addition, your battery is rated to last between 300 and 800 charge/recharge cycles. It will gradually lose charge capacity rather than abruptly fail to power your notebook.
The general consensus is that laptop batteries last one to three years. While you can slow the battery’s aging and loss of capacity, you cannot stop either decline. The temperature of the battery, combined with the amount and nature of its usage contribute significantly to your battery’s lifespan. You can ease the aging process with some 15 Ways to Extend Your Laptop Battery Life
Lower temperatures slow down the self-discharge (loss of charge while disconnected) and aging process of the elements within your laptop battery. Therefore it follows that higher temperatures shorten the life of your laptop battery. Connect  while on laptop AC  power adapter  causes the internal temperature of the battery to rise. Removing your laptop battery and storing it in a cool, dry place will help to slow the aging process. Keeping your notebook in a hot environment is also detrimental to your battery.
Amount of Usage
The Lithium-Ion batteries used in laptops are rated to handle between 300 and 800 charge/discharge cycles. Some of these cycles are used when you leave your laptop contect to your notebook while on AC power. On AC power adapter, the notebook will routinely “top-off†the battery when its charge reaches predetermined levels (i.e. 95%). Removing your laptop battery  and storing it in a cool, dry place will help to preserve some of these cycles.