So, I haven't had a chance to buy a different brand of batteries, but I did test one non-Flashmasta cartridge: Sonic Pocket Adventure. I know that this game in particular really pushes the hardware and, in some cases, you can see the hardware not be able to keep up when the game starts to lag. I played the game for 22 minutes (timed it) without it ever turning off. I want to emphasize that the batteries I'm using were new; so, either I got screwed on a large pack of new batteries or something else is wrong (I've tried multiple sets of batteries from the pack).
I then tried the Flashmasta again and, surprisingly, I was able to get through two tasks before the game turned off at around 8 minutes, which is a fair deal longer. So, I honestly can't tell (right now) if it's the system or the cartridge.
I did notice that every time the system shuts off with the Flashmasta and I put in any cartridge and turn it on, I have to re-enter information like the language, time, etc.
I then tried the Flashmasta again and, surprisingly, I was able to get through two tasks before the game turned off at around 8 minutes, which is a fair deal longer. So, I honestly can't tell (right now) if it's the system or the cartridge.
I did notice that every time the system shuts off with the Flashmasta and I put in any cartridge and turn it on, I have to re-enter information like the language, time, etc.