In my bicycle room I have a heavy gauge steel toolbox on a brick paver base, the inside is lined with a fire blanket. I have a hailong and I take it off and charge it in said box. I got the idea from an upstairs slow combustion room heater I have. It has an insanely hot fire in it that burns...
I have an old 2004 bike with a 750W BBS02 I ride for fun and am currently building a BBSHD one on a full suspension mtb bike I bought new. Am waiting though for the new ebike laws to be finalized first though.