Description
External power supplies are used both with equipment with no other source of power and with battery-powered equipment, where the supply, when plugged in, can sometimes charge the battery in addition to powering the equipment.
Use of an external power supply allows portability of equipment powered either by mains or battery without the added bulk of internal power components, and makes it unnecessary to produce equipment for use only with a specified power source; the same device can be powered from 120 VAC or 230 VAC mains, vehicle or aircraft battery by using a different adapter.
Vikrant –
I am fully satisfied with the Philips Respironics PR System One REMstar 80 Watt Power Supply. It’s sturdy, compact, and delivers consistent power to my CPAP machine without any issues. Trustworthy brand, reliable performance – highly recommended.