Pairs of these cost about the same. Operate for less than $1/pair since the cheapest UPS backup batteries have f1 connectors.
Protect Your AirPods Pro In Style: Filoto Rose Gold Silicone Case With PomPom Keychain For Women And Girls
20 Review
Large Waterproof Cable Organizer Bag For Travel, Universal Electronics Accessory Holder, Portable Gear Carry Case For Cables - Black
28 Review
Protect Your Airpods In Style With Hamile Cute Cover - Black Cow Pattern For Girls, Women, And Boys - Compatible With Apple Airpod 2 & 1 - Portable Keychain Accessories Included
25 Review
Elago AirPods 2 Dust Guard Cover - Gold, US Patent Registered - Compatible With Apple AirPods 2 Wireless Charging Case
27 Review