OEM better, but they don’t last as long as they should either.

You still have to worry about access your vehicle with the emergency key inside the lost/stolen fob. 

You can try the procedure to add it. If it is compatible it'll work. The old key doesn't have to be unmatched/erased from the old car. 

As the battery was changed two years ago I would think it is most probably the battery failed and you need a new one.    Check what is the warranty on your battery and if it is still valid take it to the shop for checking and replacement if it is bad.

The tester that auto shops and many DIY'ers use does not require more skills than basic reading.   TOPDON BT100 Car Battery Tester 12V Load Tester, 100-2000 CCA Automotive Alternator Tester Digital Auto Battery Analyzer Charging Cranking System Tester for Car Truck Motorcycle

Thanks for your time mate, I have not seen any O'Reillys outlets either. In any case I prefer to use a Ford dealer, not because they may be better but right or wrong I trust them more. BTW I noticed you also have a 2016 Edge Titanium, is that with the 2.0L eco boost?   Now to my subject, the battery charging is done and when I open the doors I can see the lights coming ON, however I notice in the navigation screen saying "Power is OFF to save the Battery" and trying to start the engine nothing happens. Tomorrow I will call the dealer and hopefully I will get an appointment tomorrow. A friend will come to give me a boost and hopefully the car will start. If not I will have to get a tow truck and see how he will get the car out of my garage. I have this car for 10 years and has been 100% trouble free but now what I have looks a big problem. Will post back when I have more news

A dead cell used to be somewhat problematic "back in the day".  I don't know if it is still an issue with todays batteries.  But it does sound like a possibility.     You say you don't have an Autozone, how about O'Reillys?  They should also be able to test it.  Or any auto parts store really (Napa, etc.).

First thing you need to do is pull the key off the top and compare the Ford part numbers and frequency ID codes.  If the fobs don’t match, it won’t work.  Second thing that may have to be considered, is the Escape fob still programmed to the Escape?  Since you are trying to add a third key to your Edge, you can DIY and the worst case scenario, it won’t program to your Edge because it is tied to another vehicle.  I am willing to bet that any used fobs need to be unmatched from their vehicles before being able to be learned to a new vehicle.   It makes sense because, back to my situation, I lost a key and two are required to do any programming.  I had to go in and delete all old keys (mark as lost) and program my remaining OE key along with my new replacement. 

Any explanation without testing would be a thumb-suck.   Testing is what's needed, and the "Autozone" testing suggestion was meant to be an example of the service such stores offer, and most likely some in Canada do the same.   A dead/discharged battery could be the symptom of a failed/failing battery or a parasitic drain or a charging system failure.

Remember years ago when I had a bad battery the engine will turn slow and eventually will start if I was lucky. However with the current problem I have in my Edge after the first few stops I did the engine turn once or twice and started like new but in my last stop the battery was dead. That I don’t understand how the battery went dead instead of going dead "slowly" meaning it will turn the engine but at very low RPM.   Any explanation to make me understand what went wrong?