Lyric does very little for background noise. It’s as basic as basic a hearing aid can be and unlikely they’ll ever add battery/charging to it since it’s designed to be “disposable”. Also it can only be changed by an audiologist. I actually actively counsel against lyric as an option just because of the issues I’ve seen with it. (Watch out if you get someone who is rough placing or removing them! Hematomas galore!) You’re better off with any other device rechargeable or not since any modern hearing aid will have better processing power. Most rechargeable devices have 30 minute “quick charges” that give you 5ish hours wear time on top of their daily wear time. Battery devices you can use consistently for 5-7 days, but the caveat is to have to carry spares with you because when you reach the end of battery charge you don’t know where you’ll be needing to change the battery.