Compatible with the MDHearingAid CORE and LUX models. Power your hearing aids with long-lasting size 312 batteries. Each battery can last between 5-12 days,depending on use and hearing aid model.
Made in the USA
For best results, keep batteries stored in original packaging with tab on until use. After removing theadhesive tab, wait one (1) FULL minute before inserting into device for battery to become fullyoperational.