Lappymaster model no. R3000 laptop battery is 100 percent compatible with Presario R4015EA laptop. It is rechargeable high capacity battery, Powerful with long operation time, Wide Compatible, Electicity-saving function, User friendly, Long cycle life, Rapid Change, Environmental Friendliness , Economic Efficiency and long lasting. Lappymaster uses only top quality cells and parts for each compatible battery. Our quality assurance process guarantees that our batteries meet or exceed OEM battery performance as well. Each battery is tested at an original laptop by the manufacturer. Lappymaster laptop battery is 100% tested made in India product .Lappymaster believe in High Quality, Low Price, Best Service, Fast Shipping, Safe Packaging, Easy Warranty Process, Good Product & Affordable Price make customer delighted.