SIMPLE VISUAL INDICATION OF BATTERY CONDITION Key fob design battery tester that will give a clear indication on a LCD ladder display. This will test all button-type batteries.
RAY-O-VAC QUALITY PRODUCTS Standard A-10 Zinc-Air button cell used on most Sensorcom wireless in-ear products, tinnitus maskers and BangBusters. All custom-fit wireless earphones use the A5 batteries.