The HP nc4000 Series Battery with Travel Pack can charge one battery at a time using a 6-Cell Lithium Ion Battery. The HP nc4000 Battery with Travel Pack is compatible with HP nc4000 and nc4010 Notebooks.
- Ability to recharge a battery when not in use
- Provides an extra 3.5 hours of battery life when on the road
- Provides up to 7 hours of battery life when used with the travel pack and primary battery