1.5 volts. 1.5 V lithium. World's longest lasting in high tech devices. Holds power (shelf life) up to 20 years. Up to 9X longer (Lasts up to 9X longer in high drain digital cameras vs. Energizer Max. Results vary by device.). Less waste (use less batteries, create less waste). That's positive energy. Lightweight and performs in extreme temperatures (-40 to 140 degrees F). energizer.com/lithium. Guarantee: Due to advanced technology, lithium batteries will not leak under normal consumer usage. If you believe that you have a leaking Energizer lithium battery, contact 1-800-383-7323 for return instructions. Questions or comments? 1-800-383-7323. Made in Singapore.