Home » Shop High-Quality Hearing Aids and Accessories for Hearing Health » Batteries, Testers and Tools » ZPower 312 View cart “Activair Battery Tester” has been added to your cart. $40.00 ZPower 312This product is no longer available. Size 312 battery. Rechargeable Out of stock SKU: 52066-1 Category: Batteries, Testers and Tools Related products Mirror-Go-Round $15.00 Add to cart Rayovac Extra Advanced ZM Batteries Size 312 $28.00 Add to cart Rayovac Extra Advanced ZM Batteries Size 13 $28.00 Add to cart Single Battery Caddy with Chain $4.00 Add to cart