For HP Compaq nx7400 Adapter is rated at 19V 4.74A 90W.The high quality laptop charger for hp compaq nx7400 provides your laptop with safe and reliable power.It is over Charge protection, Voltage protection, Temperature protection, Short circuit protection, enjoys 1-Year Warranty,60-Day Money Back!Brand New Replacement For 19V 4.74A 90W HP Compaq nx7400 AC Adapter/Power Supply/Charger With Laptop Cord.The Adapter is a 90W rated power supply and replaces hp compaq nx7400 laptop charger. Designed to meet HP's original specifications. The Replacement HP AC Adapter is designed to be 100% manufacturer compatible and will meet OEM specifications.Please check voltage and amperage rating on the bottom of your laptop before placing your order, which looks like 19V --- 2.1A. HP Compaq nx7400 AC adapter charger is safe to use within +/- 1V of the laptop voltage. It is safe to have a higher amperage. Do NOT purchase an AC adapter with a lower amperage than is listed on your laptop. Please make sure the tip size also matches your DC output.Avoid the metal tip of the adapter from getting in contact with other metal objects because it can cause short-circuiting. Your laptop might get damage when a short-circuited charger is used.Welcome to replacement laptop AC power adapters online store.Replacement HP Laptop AC Adapters and Power Supply for Notebook Computers.Replacement laptop AC adapter is guaranteed to meet or exceed original HP laptop AC adapter.Full 2 hours burning test; 3 times quality check and 2 times drop test by QC before package.Warranty and Guarantee: 1 year warranty, 60 days money back.