Going on a trip and need extra run-time? Need to simply replace a spent notebook battery?You asked and APC responded. The company you know for "reliable power" and "availability" will now be the same company you can rely on for your notebook computer's battery power. Now you can power your portable computer with the same Legendary Reliability you found in APC's global, end-to-end power protection products and services, including surge suppressors, uninterruptible power supplies (UPS), power conditioning equipment, related software, and professional and consulting services for Nonstop Networking.This battery is designed for HP OmniBook 4100 series.