ITEM NAME:Universal Hearing Aid Button Cell Tester Voltage Checker Battery-StorageN LJ Product Description 1.Item Name: Hearing aid battery tester 2.Color: Blue / Yellow / Black(Random) 3.Material : ABS 4.Usage: Used to test hearing aid battery and hold battery, with two battery compartments 5.Private logo is available on request. (MOQ > 200 pcs) Package include:1Pc Battery Tester Tips: After the seal of a zinc-air hearing aid battery is removed, air enters the cell to activate it. After one or two minutes the voltage of the cell reaches its nominal value. It stays there over most of its life before dropping rapidly near the end. Because it is so constant over most of its life, the voltage doesn't tell much about how much battery life is left. Nevertheless, a simple test is useful when your hearing aid doesn't work and you want to know whether it is the device(e.g. bad contacts) or the battery..It stays there over most of its life before dropping rapidly near the end. Color: Blue / Yellow / Black(Random).
