That’s not necessarily a valid reason. The “with-it” tech that Elon Musk-types would like to sell you is to, say, have solar power charging Tesla batteries in your home. When an earthquake knocks out power to your home, you have your charged house batteries to rely on at least for a few days if not more if your solar setup still works. In a modern civilization if power is disrupted for more than a few days, one has a bigger problem than charging your HA’s. A gasoline-powered emergency power generator is another way to charge your HA’s (and the rest of your home). A really well-off friend that I know has one built into the wiring of his house. When a tree fell in a storm and took out the utility lines on his street including knocking down a pole or two, life in his house went on normally while all his neighbors’ house were pitch dark at night for days.
Is it so with the zinc-air batteries that the phone app can’t really tell you exactly how charged they are because the discharge voltage/SOC (State of Charge) curve is so flat? Since the voltage of Li-ion batteries dips as they are discharged, that makes it possible to calibrate the SOC of the HA batteries and allows you to tell in the phone app “exactly” how much charge you have left. If that difference is true, i.e., you can never tell exactly when your Zn-air battery is about to croak, then on a daily basis you get a nice convenience with Li-ion batteries that you don’t with zinc-air. Pardon my ignorance. I’ve never owned HA’s with disposable batteries. But that daily convenience should also be weighed against the much rarer instance that you’re not fully preparing for by not providing any backup electricity generation for your dwelling… Just stocking up on disposables…
