Model Number:0903001 Item Type:Ear Care Material:ABS Item Name:hearing aid battery tester Color:Blue / Black / Yellow Certificate:CE, FCC Usage:Used to test hearing aid battery and hold battery Universal hearing aid battery tester 1. Item name: hearing aid battery tester 2. Color: blue / yellow / black 3. Material: ABS 4. Certificate: CE, FCC 5. Usage: used to test the hearing aid battery and hold the battery, with two battery compartments 6. The private logo is available on request. (MOQ> 200 pieces) Advice: After removing the seal from a zinc-air hearing aid battery, air enters the cell to activate it. After one or two minutes, the cell voltage reaches its nominal value. It stays there for most of its life before falling quickly towards the end. Because it is so constant for most of its life, the voltage does not say much about the life of the battery. However, a simple test is useful when your hearing aid is not working and you want to know if it is the hearing aid (eg Bad contacts) or the battery.