Replacement For Acer Aspire 9420 Adapter is rated at 19V 4.74A 90W.The high quality laptop charger for acer aspire 9420 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!This Acer Aspire 9420 Laptop AC Adapter is specially designed for your Acer Aspire 9420 notebook. Our lightweight easy-to-carry Acer Aspire 9420 power supply will enable you to simultaneously operate your Acer Aspire 9420 notebook and charge its battery from electrical wall power outlets, The Aspire 9420 power adaptor can also use as a spare Acer Aspire 9420 battery charger allowing you to have a power connection at home and at the office without having to carry it with you .Every Acer Aspire 9420 power brick (power cord included) from us is guaranteed to meet or exceed OEM specifications and is fully compatible with the Acer Aspire 9420 laptop.The Adapter is a 90W rated power supply and replaces acer aspire 9420 laptop charger. Designed to meet Acer's original specifications. The Replacement Acer AC Adapter is designed to be 100% manufacturer compatible and will meet OEM specifications.Always put first the DC output plug into the laptop's power jack before putting the input plug on the power outlet. This is the correct method.Switch off the Laptop AC power adapters when you are not using the laptop to prevent overheating Don't shake or knock the adapter. Improper handling may break the internal parts and circuit boards.Keep your adapter in a dry place with room temperature. Just like other electronic devices, adapter can get damage cause by high temperature.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.Never pull the cord to detach the plug from the power outlet because the wire might be slashed or loosened.