Here are the key features and specifications of these batteries - Compatibility: These batteries are suitable for use with all hearing aids that require size 10 batteries. They are also compatible with various other battery designations, including 10, 10AE, 10A, VT10, XL10, AP10, 10HPX, R10ZA, L10ZA, AC10E, DA10X, ZA10, V10AT, DA10H, AC10, AC10E, V10A, DA10, 10HPX, PR-13PA, PZA13, PR70, DA230, and DA10n6.