I have had kindle 5th gen for app 5 years and no problems but the last 2 weeks battery has only been lasting for an hour or so and now it won't connect to my Wi-Fi, (same Wi-F I have always had), says "available Wi-Fi Networks 0 and does not give me an option to look for it, have tried resets, turn offs, power on, turning Wi-Fi off and back on numerous time to no avail.
Did you reboot by holding the power button for a full 30 seconds? If not, try that.
Five years is right around the expected lifespan for a lithium ion battery, so it might be time to consider replacing your Kindle. Amazon has a trade in program here - http://amazon.com/kindle-trade-in