“Power Rangers” is a pretty well-made movie with strong characterizations, enjoyable action (though not enough of it), a few topical touches and a nutritious helping of fun. The ultra-cheesy rubber suits of the various TV series are exchanged for some pretty good CGI, and the alien kung fu fights are drastically improved — apparently one can still buy nice things with a $100 million budget. The titular heroes of the film are small-town teens granted powers by ancient alien artifacts and mentored by the authoritative Zordon (Cranston) to battle extraterrestrial evil one Rita Repulsa. The film employs interesting cinematic techniques such as an extended, continuous take appropriately used to convey the chaos of a car chase and some imaginative cinematography and editing. Director Dean Israelite’s previous film, “Project Almanac,” also about teens coming upon a source of great power, was coolly received, but he shows a sure hand here. “Power Rangers” includes among its reimagined teen superheroes one on the autism spectrum and another who feels she can’t come out as a lesbian to her family. Ultimately, this is a kids’-property superhero movie about teens getting power from ancient aliens and battling Rita Repulsa (Elizabeth Banks, taking large bites of the scenery).