IIRC MM specifically stated in the pamphlet which came with my 20th anniversary stingray that Duracell was the recommended brand as it was always within standard spec/size and other brands might crack the batt compartment. Maybe it met an ISO 5000 parameter.I will only use Duracell in MM
Don't trust any other brands.
Learned the hard way.
It's the only 9V I use in the house for the actives, smoke alarms, multimeters, tasers etc...