Is this even a widespread problem? I just played both 4-8 Puzzle (Save the Wizard) and 4-8 action (Indiana Jones) with Battery Saver disabled and it never froze. I usually play with it enabled and it never froze either.
However, the game does freeze randomly, probably due to the high amount of compressing, since it only happens when you summon of bunch of stuff in addition to the objects included in the level.
And turning Battery saver mode on seems like a weird fix, since it usually causes problems.