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.

• Spare Battery

Having an extra battery lets you double the time you can use your computer without plugging in, all you have to do is keep a spare charged battery in your carrying case and you will be set for long meetings or flights.

• Rechargeable

The Lithium-Polymer battery is easily rechargeable. Just plug the laptop into a power source with the battery installed and it will charge. This allows you to operate your computer off power and charge your battery at the same time.

• MacBook Pro Compatibility

This battery is compatible with the aluminum unibody MacBook Pro, introduced in October 2008.