9V Energizer battery pack of 12. Energizer alkaline batteries industrial bulk pack. Energizer industrial batteries are long lasting with the AA, AAA, C and D sizes offering a 10 year shelf life and a no leak guarantee. The 9V sizes carries a 5 year shelf life. For long lasting power in your job site devices, Energizer batteries hold their power for up to 10 years while in storage, so you have power for your devices when you need it most. These reliable alkaline batteries are industry-standard dimensions with a plastic jacket label and reliable performance.