TOKYO Toshiba Corp. said it has launched a program to exchange faulty Sony battery packs used in about 340,000 of its laptops.
Toshiba discovered this summer that some battery packs failed to charge and discharge. The suspect battery packs were manufactured by Sony between March and May of this year.
Toshiba said failures occurred outside of battery cells and would not cause packs to overheat in the same way reported in Dell and Apple laptops.
A Sony spokesman said insulating paper used in the Sony battery packs contained an acid ingredient that contributed to manufacturing problems. The acid may have corroded an adjacent component, interfering with the battery's charge and discharge functions.
Faulty battery packs were installed in Toshiba's Satellite and Tecra laptops. Toshiba said it will exchange battery packs at no charge to customers.