Skyrise Powerone Hearing Aid Battery 312 (6 PCS), 1.45 V Battery Hearing Aid Battery Size 312 Made in Germany For Digital Hearing Aid Long Lasting Hearing Aid Battery, Powerone zinc hearing aid batteries are high quality with long life, even in powerful instruments. PowerOne batteries provide long running times at a constant voltage level and thus contribute to an optimum hearing aid performance. PowerOne batteries are reliable and safe due to triple sealed high quality material e. g. stainless steel. Zinc batteries are environmentally friendly as they are 100% mercury free. Easy removal of cells with the innovative delivery wheel ensures only one battery is delivered at a time. Maximum product protection thanks to the security seal. Secure closure of the packet with lockable dispensing tab. Clear color coding for instant recognition of your battery type. Environmentally friendly.