SONY, Limited Warranty For Rechargeable Batteries, USB Battery Chargers and Mobile Projector Sony Magnetic Products Inc. of America and Sony of Canada Ltd. {in Canada} ("Sony") warrants this product (“Product”) against defects in material or workmanship. For one (1) year from the date of original purchases, Sony wil replace the Product at no charge or at Sony's option, refund the purchase price shown on your receipt. To obtain warranty service in the U.S.