I called Canadian garage doors for replacing my old garage door opener. I installed my garage door myself and at that time I did not knew about power ratings of openers. I didn’t pay much attention back then and paid the price afterwards. So, this time, I decided to call the professionals. I selected these guys after reading about them online. And I must say internet guided me right! They were highly courteous from the moment I called. All my queries about power ratings were clarified. They suggested that I install LiftMaster Opener with Additional battery. Now, the opener works well in blackouts also. The jerky door opening and closing is a thing of the past. Well done guys!