![Rayovac Extra Hearing Aid Batteries - 28 Pack - Free Battery Keychain Tester/Carry Case - RxEars®](http://www.rxears.com/cdn/shop/products/rayovac-extra-hearing-aid-batteries-28-pack-free-battery-keychain-testercarry-case-accessories-rxears-316249_{width}x.png?v=1591757674)
Includes seven 4-cell cards of batteries, plus a battery tester with a spare battery compartment and a handy carry chain for attaching to your purse or keys.
Rayovac Extra Advanced, Zinc Air Hearing Aid Batteries 1.45V Dial Card-4. The World's Longest Lasting Battery.
Choose from 10A or 312 or 13 size batteries.