I recently started having the issue of having to "check the battery cover" on my S5 every 5 minutes. There is so much on the WEB about this, but no "definitive" answer. I tried the following and for the past 3 days have not seen the warning.
I removed the back cover and the micro SD card. I cleaned the memory card contacts with a soft eraser and reinserted, then cleaned the back cover with a damp cloth, and where the silicon gasket contacts the back of the phone. After putting it back together and restarting, things seemed "normal"
I removed the back cover and the micro SD card. I cleaned the memory card contacts with a soft eraser and reinserted, then cleaned the back cover with a damp cloth, and where the silicon gasket contacts the back of the phone. After putting it back together and restarting, things seemed "normal"