Long lasting! EZ turn & lock + powerseal. Protects (From leakage of fully-used batteries up to 1 week at room temperature) your devices. 0% mercury. www.energizer.com. AZ312DP-16. 1,4 Vcc Zinc Air Batts. Replaces all size 312. Patents: www.energizerpatents.com. Packaging recyclable if available in your area. Made in USA.