HP ProBook 4321S laptop car adapter replacement

This replacement HP ProBook 4321S laptop car adapter is rigorously tested, meets or exceeds original HP ProBook 4321S laptop car adapter's specifications, brand new with 1 year warranty.

(a) It is very important to compare our HP ProBook 4321S car adapter's output voltage with your laptop's input voltage! Your laptop's input voltage MUST be within the range of our laptop car adapter's output voltage! Using wrong output voltage car adapter will damage your laptop.

(b) You can calculate your original HP ProBook 4321S ac adapter's output Wattage [W] by multiplying the Ouput Voltage [V] by output current [Amps] i.e 19V X 4.74A = 90 W. You can choose a car adapter which has higher output Wattage [W] than your original ac adapter's; but you can not choose a car adapter which has lower output Wattage [W] than your original ac adapter's because it can not provide sufficient power to your laptop. Car adapters with higher output Wattage [W] will not damage your laptop. The car adapter's output power (Wattage) are maximum load ratings. Computers only draw as many watts as they need.

(c) Please carefully check the plug tip's size of the car adapter to make sure it can fit into your computer. First of all, please make sure that your laptop's model number is listed below.

Click here for tips on HP ProBook 4321S car adapter care and on how to find out your laptop's intput voltage and original ac adapter's output wattage.