I have had my console since August 2015, I keep it well ventilated and clean it with compressed air when I can, last night...

I found this after seeing your question. I hope it helps. I posted the image because I had to jump through a hoop to see the answer. Here is the website it comes from: Three ways to Hard reset Blackberry Priv.

There are several reasons you won't be able to download apps on your phone such as: space requirements and if the app is available in your country. The latter is usually my problem as whenever I go to Google Play Store I get a green notice saying "This app is not available for your country or region" and my only way around that is to find the app's APK online and disable a feature temporarily in the security section. What exactly does your phone say or do when you try to download an app?

I am not saying this will work for you but sometimes I use to switch off battery function, what I mean by that is, I use to use the battery interface to switch off battery charging whenever my AC adapter was plugged in since I had it plugged in 100% of the time. I would have the battery charged full but use only AC power. So see if you accidentally turned off battery function and have your laptop working on AC power only. that way if your battery is not fully charged and you unplug the AC adapter your laptop will turn off. Otherwise, as Alex asked, how do you know it is working? There should be a function allowing you to test your battery, to see what its charge rate is, to see how well it is holding charge and how much charge it is actually holding.