The Rechargeable Battery for 15.4" MacBook Pro is a rechargeable, 50-watt-hour lithium-polymer battery for the 15.4" MacBook Pro notebook computer. The battery is identical to the one that ships with the laptop, allowing it to serve as a spare or a replacement. This is an excellent solution for anyone who needs to replace their MacBook Pro battery or would simply like a spare for extended usage away from a power source.
