Do you know what the battery % was ?
I foolishly forgot to check the exact percentage before doing the factory reset but the battery was still performing really well. Would comfortably last all day.
I'm very interested :) is it still for sale?
I bought my current iPhone 7 from Cyclechat way back and time has taken its toll. https://www.cyclechat.net/threads/sold-iphone-7-black-128gb.240534/