Laptops can be powered with a battery or a power adaptor and power source. Toshiba Satellite E300 Laptop Batteries have a life expectancy of around two years. Each time the battery is charged and used, its efficiency slightly decreases. Over time, this will lead to a decrease in how long the battery powers the Toshiba Satellite E300 laptop. Reconditioning the Toshiba Satellite E300 laptop battery can help restore some of the function and efficiency. Reconditioning is most effective on NiCD or NiMH batteries. Although it won’t hurt to try it on a lithium battery, the results are likely to be minimal.

Instructions 
1.Connect the Toshiba Satellite E300 laotop to an electrical outlet. Leave the computer connected this way for up to six hours, so the laptop battery for Toshiba Satellite E300 can charge.

2.Separate the power cord from the Toshiba Satellite E300 laptop. Turn the laptop on. Let the laptop run on battery power until the battery dies

3.Repeat this process three times. The battery has now been reconditioned.