What is hp 135w?

Unfortunately, as an AI language model, I cannot be sure what you are referring to. Is it possible that you meant the HP 135w AC Adapter? Here are the details:

• The HP 135w AC Adapter is a power supply unit designed for use with select HP laptops and mobile workstations.
• It provides a maximum output power of 135 watts, which is enough to charge most high-performance laptops and workstations.
• The adapter comes with a 4.5mm to 7.4mm conversion dongle that allows it to be used with laptops that have a 7.4mm or 4.5mm barrel-type connector.
• The HP 135w AC Adapter is energy-efficient and meets strict environmental standards like Energy Star and EPEAT Gold.
• It has overvoltage protection, short circuit protection, and overheating protection features that ensure optimal safety and longevity of the adapter and your device.
• The adapter is compact and lightweight, making it easy to carry around with your laptop.

I hope this helps! Let me know if you have any other questions.