2 x VARTA Professional Lithium CR2 6206 CR15H270 3V German Battery | eBay
Amazon.com: Shentec CR2 Battery 3 Volt 1000mAh High Power 20 Pack 3V CR2 Lithium Batteries with PTC Protection for Flashlights Digital Cameras, Toys, Alarm Systems 20PCS (Non-Rechargeable) : Health & Household