HP Compaq tc4400 Tablet PC- Getting Started - Enhanced for Accessibility Windows Vista

First-time setup
Step 1: Insert the battery pack
To insert the battery pack:
✎
Battery packs vary by model.
1. Turn the computer upside down on a flat surface, with the
battery bay toward you.
2. Slide the battery pack 1 into the battery bay until it is seated.
3. Press the battery pack 2 into the computer until it clicks into
place.
1–4 Getting Started