6 X 357 SR44W EPX76 Compatible Batteries suitable for LEICA R3 R4 R5 R6 R7 MOT Cameras. Generally used to power the internal focus guide in the eyepiece as well as other camera information which varies by Camera As Pictured, these are new in blister packs, to be sure you are getting the best available product. Rayovac Silver Oxide Made in Switzerland, to provide the required voltage stability not found in the cheaper alkaline chemistry on offer. We do not supply Chinese Branded Silver Oxide, hence our prices may be higher, but you will get the best quality available.