Etymotic The BEAN® Quiet Sound Amplifier® - Manual (Page 7)

LOW BATTERY WARNING
6
Low-Battery Warning
A feature called LOBAT
™ alerts you when the battery is at the end of its life.
• A slow, quiet ticking sound gradually becomes faster and louder,
like the sound of a motorboat.
• After the warning sound first becomes audible, it may be a few hours
before the battery goes dead.
• QSA performance will not change while LOBAT is sounding.
• Each QSA uses one #10 zinc-air battery.
• Zinc-air batteries do not have to be recycled.
• Zinc-air batteries can be disposed in the trash.
• Zinc-air batteries are not rechargeable.
Batteries: Estimated Battery Life:
9 days continuous operation
2 weeks (approx) if turned off when not in use