MacBook Pro: Should I put my battery out?

Solution 1:

Apple recommends not using a MacBook Pro without a battery, since it reduces processor speed when using only the AC adapter to “prevent the computer from shutting down if it demands more power than the A/C adaptor alone can provide.” You also run the risk of bumping the AC adapter and accidentally shutting down the computer, losing all your unsaved data. They also don’t recommend leaving it plugged in all the time:

Apple does not recommend leaving your portable plugged in all the time. An ideal use would be a commuter who uses her MacBook Pro on the train, then plugs it in at the office to charge. This keeps the battery juices flowing. If on the other hand, you use a desktop computer at work, and save a notebook for infrequent travel, Apple recommends charging and discharging its battery at least once per month.

In conclusion, just use it normally, letting it charge and discharge regularly. You should also calibrate your battery from time to time.

Solution 2:

Clock speeds on some Macbooks and Macbook Pros are limited without the battery installed. This is to prevent the wallwart from being overtaxed during short periods of high activity.

If your Macbook Pro is such a machine, be aware that you will be limiting your processing speed if you take the battery out, and leaving yourself open to data loss if power is interrupted.

Apple recomends that you do not use a Macbook or Macbook Pro without a battery installed.

Apple uses lithium-ion batteries in their notebooks, which do not suffer from being kept in the machine.