The problem with buying extra batteries for any laptop is that you could only charge them inside the laptops themselves. And if you're on an extended business trip, you have to wake up in the middle of the night just to swap the battery out. Not very efficient.

Well if you have a Macbook or a Macbook Pro, you can sleep soundly through the entire night and wake up with two refreshed batteries in the morning.

With NewerTech's MacBook and MacBok Pro battery charger, you can charge two batteries at once. The charger has two slots, one that chargers and conditions and the other just charges, and will work on both stock and aftermarket MacBook/MacBook Pro batteries.

At a price of $149, it's not cheap, but definitely worth the price if you need it.