That will work OK Den. Biggest danger is where you leave it in your house or garage. They dont all catch on fire but many have. I keep both my battery bicycles in a steel shed so any fire will not burn my house down.
Usual rules are not to leave the battery unattended when on charge if indoors or at night. Many people charge phones as they sleep but not a good idea. I also keep all my lithium drill batteries in steel cabinets.
Never had any battery problem but some people do.I expect its a low percentage but when it happens, it can destroy a house very quickly