Can a Spike handle back EMF generated by a motor being backdriven? A related question is if a Spike would be trashed if someone mistakenly hooked a battery to M+ and M-?
Yes, a Spike can handle the back driven EMF provided the motor would not blow the 20A breaker under normal operation. Yes, a Spike can be trashed with hard connections to a battery through the one of the M+ or M- leads.