I recently received a Dell Inspiron 6000 and a Dell Studio 1737 laptops from my uncle minus the chargers. A few years ago, both the original chargers died so they bought replacement Rayovac batteries for each laptop and a replacement charger. I guess it worked for a while until the batteries stopped charging. I'm assuming it was due to the charger not being OEM. Right now, I have the laptops running on an HP 19.5 volt 7.4 amp charger with the same polarity but none of the batteries charge and I get the error message on boot about using an unknown charger. So right now, I'm looking at getting an OEM charger to see if I can get the batteries to charge and to return the HP charger to my dad (it's the charger for his work laptop). I found this Dell PA-3E charger but I'm not sure if it will it work. It's the same voltage, amps and polarity but it's not the same model charger that's written on the bottom of the laptop. I'm afraid that the laptop will run but will not charge. Would this charge and work for both the Inspiron and Studio laptops?