Are cordless portable blenders powerful enough to crush ice?

It depends on the model. Across the reviewers we read, higher-wattage corded personal blenders (900W and up) handle ice and frozen fruit far more reliably than small battery-powered units. Cordless options like the Ninja Blast and Blast Max are praised for convenience and travel use, but several reviewers note you typically need some liquid and a little patience versus a corded base.