The Consumer Council has issued a warning over four types of rice-cooker which it says could spark fires and cause electrical injuries.
A council survey of 23 rice-cookers found traditional-style models less satisfactory than those with modern features.
Only six models - none of which are basic rice-cookers - passed all tests based on new electrical product requirements taking effect next month.
The four worst performers were the traditional-format Kapok K8-650, made in China and selling for $190, two electronic warmer/cookers, the Crown MR-188 and Loyola PK-180 made in China and Taiwan respectively and priced around $500, and the computer-controlled Mitsubishi NJ-A18ST, made in Thailand and costing about $780.
All four had the potential to short-circuit, which could cause a fire or electric shocks, the survey found.
Council publicity and community relations committee chairman Dr Lo Chi-kin warned that rice-cookers should not be used for more than their stated purpose.