🇺🇸 USA Buyers: Orders ship quickly from the EU via DDP (Delivery Duties Paid) — duties/tariffs/customs fees are covered, so there are no extra charges upon delivery to your door.To hear well means so much, and never more so than today. Today’s advanced hearing systems need advanced batteries, like Rayovac Extra Advanced. Battery size: 312 Type: Zinc-Air (no mercury). Voltage: 1.45V other designations: 312, PR41, DA312. Weight (packaging and batteries): 14 g (0.03 lbs) Made in United Kingdom. 100% authentic, original Rayovac product. RAYOVAC ® spent over 110 years thinking about batteries so you can think about them less. RAYOVAC ® batteries are rigorously tested to ensure the quality and performance meet your expectations. Please contact us if you will have any questions.❗Batteries: Whole.