Ok , so my UPS was not working and I took it to an electrical shop where used a new battery ... My question is that when a UPS is plugged in does the battery play any role ??? I am asking this because I have a doubt if the battery is very good ... I don't think it will be very bad but still ... Also , what are the dangers that can be there , I mean my power supply getting damaged or my motherboard and other components getting damaged ??? It is an APC UPS ...