Batteries 19.5V 45W Compatible with 741727-001 740015-004 - AC Adapter Charger Cord Replacement for HP 11 14 15 17, HP Envy 13 14 14T 15 15T M6, HP Pavilion 10 11 13 14 15 17 Series

i bought this to power my laptop on an extended trip to support a ham radio event my main concern is that some inverter power supplies produce a lot of noise in the radio as we use this one produced no discernible noise in the 2 meter or 70 centimeters radio as we were using everything worked fine i was leery about getting other than an hp adapter to use while in the car for example listening to audio books downloaded from youtube while traveling long distances some of this concern resulted from a feature of the hp adapter that allowed the charging of the laptop's battery to be controlled reviewers differed as to whether this capability was a feature or a defect g the pwr plus charger also puts out about one stroke two volt less juice than the oem ac adapter no worries now this charger feels like oem robust sturdy and well designed the elitebook 8470p bios and power management circuitry