Zinc air batteries

Hello. The hearing aid I’m using is the Phonak Naida L30-SP, and its battery is a zinc-air battery. I just want to ask how long it takes before a pair of batteries drains. Is it really 7-14 days? Should it really only be used for 8-10 hours per day to last for 2 weeks? If I connect my hearing aid to my phone, will the battery drain faster?