If you dislike replacing batteries of your electronic device after every few days, use Energizer Longest Lasting AAA RP-4 to make your devices last longer. Your devices will run for a longer duration on these batteries. You will save money on batteries because there will be no need to replace the batteries often. You operate a large range of electronic devices, from remote controls, motorized toys, to a variety of household devices. These batteries will not damage your devices either. You can dispose them after use like other household items, as they do not contain any mercury.