That's interesting. I haven't noticed this about my mini. I've been using amazon's batteries and occasionally some cheap ones but it doesn't seem to complain.
As long as the battery has sufficient power that the solenoid wants and everything runs well then all is good
Many of us will recommend Duracell or certain specific batteries. If you have an unusual problem then check the batteries, change them and change again if need be. Even quality brands can be a dodgy batch which works perfectly on anything but your gun then doesn’t shoot well
I had a teammate who had major grief with his TM7. It would work one day then fail the next and he sent it back and forth for servicing
A while back he was having problems at Paintfest and saw a TM15 going cheap. Happily trotted out and the TM15 just failed, went to the tech guy and they pulled out his cheap battery, sold him some decent batteries and magically both his TM7 and TM15 worked flawlessly