CHICAGO (AP) — Apple iPhone owners from several states are suing the tech giant for not disclosing sooner that it had issued software updates deliberately slowing older-model phones so aging batteries lasted longer.

Lawyers filed a class-action lawsuit Thursday in Chicago federal court on behalf of five iPhone owners from Illinois, Ohio, Indiana and North Carolina. They say they would not have purchased newer, pricier iPhones had Apple disclosed that simply replacing the batteries would have sped up their older phones.

READ MORE: Gas Pump Sticker Shock: Bay Area Approaching Nation Leading $4 A Gallon

The 20-page lawsuit accuses Apple of trying “to fraudulently induce consumers to purchase” new phones.

READ MORE: VIDEO: Asian Man Attacked In Oakland, Tries to Fight Back In Attempted Robbery

Apple acknowledged in a Wednesday statement that it introduced a fix so batteries wouldn’t suddenly die. But it said its goal was improving “overall performance and prolonging” the life of the phones. Apple didn’t return a message Friday seeking comment.

MORE NEWS: Video: Violent Carjacking From Richmond Auto Dealership; Worker Hurled From Hood Attempting To Stop Thief

© Copyright 2017 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed