Toshiba Tecra M4 - Manual (Page 169)

TECRA M4 8-11
Optional Devices
Inserting
To install the 2nd battery pack in the adaptor, follow the steps below.
1. Fit the side of the 2nd battery pack opposite the connector into the
adaptor.
2. Lay the battery into the adaptor. The latch should close automatically to
secure the 2nd battery pack.
Inserting the 2nd battery pack in the adaptor
Removing
To remove the 2nd battery pack from the adaptor, follow the steps below.
1. Slide the latch in the direction of the arrow shown below.
2. Push the 2nd battery pack up from the bottom and lift it out.
Removing the 2nd battery pack from the adaptor
Universal AC Adaptor
If you frequently transport the computer between different sites such as
your home and office, purchasing an AC adaptor for each location will
reduce the weight and bulk of your carrying load.
Latch
2nd battery pack