Who I have the same questioned this topic

Our 6s batteries need to be replaced. Went into "mom-n-pop" Verizon stores but they don't do batteries. Company store near me is closed, and reviews of other closest store are abysmal. I'm not patient with poor customer service, so what is my best option? Best Buy Geeks replace them for $49, but that involves an appointment and paperwork according to them, so does anyone have other options? Saw some Yahoo DIY videos, but they look tedious, and I don't want to mess this up.