- Our longest lasting zero-mercury hearing aid batteries ever. - The EZ Turn & Lock design keeps unused batteries safe and secure - Batteries are easily removable from the access tab on the back – but only when you WANT to remove them. The Energizer® EZ Turn & Lock package puts you in control - Longer tabs — clearly marked with the size and colour — make shopping, handling and insertion easy - 100% recyclable packaging and zero-mercury batteries power you responsibly, with less impact on the environment - The perforated package-top means you can miniaturize the pack, for easy transport and storage