Home / Shop / Batteries, Testers and Tools / Activair Battery Tester You cannot add "Rayovac Proline Batteries Size 312" to the cart because the product is out of stock. $15.00 Activair Battery Tester Hearing aid battery tester Analog reading shows battery life Features a battery storage compartment Activair Battery Tester quantity Add to cart SKU: ATEST Category: Batteries, Testers and Tools Tag: Copied From Estes Related products Effective Hearing Aid Dehumidifier Fish for Sale $9.95 Add to cart Pocketalker 2.0 Headphones with Dual Ear Buds $229.00 Add to cart Decibullz Custom Molded Earplugs $25.99 Select options 40 Rayovac Premium Batteries: Size 10 Yellow $20.00 Add to cart