? Long-lasting mercury-free hearing aid battery? 2nd generation mercury-free formula with higher voltage for quick startup;? Superior cell design resists swelling & leakage, providing optimal performance & greater consistency;? Longest tab available--makes removing battery from package & inserting into device easy;? Perforated package allows dial to be removed for convenient transport;? Environmentally friendly package made with recycled or recyclable materials;? 8 pk;? Size 10