Amazon : Cr2 Lithium Battery 3v
CR2 3V Lithium Battery 1000mAh, 12 Pack 3 Volt 10 Years Shelf Life CR2 Batteries with PTC Protection DL-CR2 for Golf Rangefinder, Flashlight, Alarm Systems, Baby Monitor, Mini55. 139. $1599 ($1.33/Count) $15.19 with Subscribe & Save discount.