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 PockeTalker 2.0 with Headphones + Dual Ear Buds $229.00 Add to cart Rayovac Proline 675 Hearing Aid Batteries $45.00 Add to cart 40 Rayovac Premium Batteries Size: 312 Brown $20.00 Read more 40 Rayovac Premium Batteries: Size 13 Orange $20.00 Add to cart