Digital hearing aid battery tester Summary This portable and easy-to-use hearing aid battery tester can be used with zinc air, silver or mercury hearing aid batteries. The digital screen will indicate the batterys remaining life. Specifications Approx Size: 29 x 63 x 13mm Approx Weight: 15g Share Tweet This portable and easy-to-use hearing aid battery tester can be used with zinc air, silver or mercury hearing aid batteries. Total £6.15 Qty