Yup
what he said ^^^


And yup.
always use recommended devices / procedures
failure to do so can result in more than the loss of a battery or device,
failure to be vigilant can (in worst case) result in severe loss of property and life.
Smokey the Tech says....
"Only you can prevent battery fires..."
So yeah.
Use officially recommended devices to charge batteries.
Don't leave them unattended whilst charging.
(which means always keep one eye literally on that charging battery).
If you need to go out or leave the area ...even for a short bit...unplug the charger...
It saves explaining to next of kin what happened and who is at fault.