AC Adapter Charger Replaces PA-1650-81 PA3971U-1ACA
PLEASE READ BEFORE PURCHASE: The way to buy right power supply adapter is to correctly match output Voltage(V), Amps(A) & most important the connector size/type. Exactly same model number power adapter can have different size dc connector so always check pin size first or contact the seller for confirmation. AC power lead (for brick shaped adapters) may or may not be included if not already mentioned or pictured so ask seller to include free if required, before or immediately after purchase.
Finally always buy genuine quality branded model adapters to avoid any inconvenience in future. The generic replacement models or fake genuine versions do not last very long and could be safety hazard too. Thanks for your time reading the information.