Contrary to other reviews I can confirm that the power supply for the Roomba 780 matches. The battery is charged, the Roomba does not report errors. Therefore, the AC adapter / charger seems to fulfill its purpose and to replace the original charger perfectly. Long-term experiences are, however, not before. From the current perspective, I would buy the charger again - but I hope that it lasts longer than the original, which 2.5 years gave up the ghost.
