In iOS 15.6 and the latest iOS 16 beta, Apple appears to have intentionally removed the AirTag battery indicator in the Find My app. . In previous versions of iOS, a small battery icon, similar to ...

An alkaline battery consists of a gel zinc anode and a MnO 2 cathode. When the battery discharges, the zinc anode begins to oxidise, forming Zn(OH) 4 2- ions in solution until the electrolyte is ...