REDROCK replacement Battery is made from High grade cells and highest quality parts. This REDROCK brand replacement battery is 100 percent comparable to Original battery in all terms including its size, appearance and most important quality. Each REDROCK Laptop Battery has to pass strict quality control procedures including filtration and safety testing of voltage, capacity and battery core (body). Before leaving the factory, so you can be rest assured for its quality, durability and performance. Now Carry your laptop anywhere and work, play or watch movies for longer hours without plugging in.