Leaving it plugged in all the time can lead to the rare spontaneous fire ignition. I use a simple 'timer' in my plug circuit. I select charging time based on my level of use and drain status of the battery. It charges for that time period and fully disconnects. Been working fine for four years. $12 at Amazon:
https://amzn.to/424mOTU
Patrick
CA
https://amzn.to/424mOTU
Patrick
CA