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✔ What's in the kit? ※ Hearing Aid Battery Size A675, 3 Pack of 6 Each Zinc Air Technology. Zinc air battery provides very high energy density and produces almost flat drain curve, which means that you can expect the same power throughout the battery life. ✔UK zinc air hearing aid batteries generate energy from zinc oxide in the air - they can be activated by removing the label seal. ✔Our improved durability extends the shelf life and stability, so you can make full use of your six batteries to avoid the headache of expired batteries. The UK offers reliable performance throughout the battery life, bringing your best experience to an end. With our durable battery punch card, you can easily transfer batteries and be ready to keep the hearing aid powered when you need it most. suitable for A675 batteries. 1. The raised dial makes it easy to grasp and rotate. 2. Step 2. The rear door protects the battery and holds it in place. Article 3: Easy to disassemble label activated batteries. Chapter IV. Perforated cards are easy to carry. Step 1: Delete the battery tab. Step 2: Let the battery stand for one minute. Step 3: Insert the battery into the device. Step 4: Close the door and enjoy it.