Toshiba Satellite P55t-A5116 Charger
I simply googled the make, model and number of my computer with "adapter", and amongst the results were this website then unknown to me (and the only one with an exact match). I took a chance and it paid off. The replacement adapter works perfectly. The chord to the outlet is a tad shorter than the original, but the original plugged into the new adapter just fine. The price was unbeatable, too. A real life saver.
