Apple Macintosh PowerBook 1400 - Manual (Page 81)

The correct power adapter for your PowerBook 1400 series computer
supplies 45 watts of power (model number M4896). Adapters for older
models of the PowerBook provide lower wattages.
Removing or replacing the battery
To remove or replace the battery, follow these steps:
1 Save your work and then shut down the computer, put it to sleep, or plug in the
power adapter.
2 Close the display.
3 Push and hold the latch beneath the battery.
4 While holding the latch open, pull the battery out of its compartment.
2 Slide the battery out.
1 Slide and hold the latch to the right.
WARNING Use only the power adapter that came with your computer.
Adapters for other electronic devices (including other portable
computers) may look similar, but they may damage your computer.
81 Power Management