Wein Cell MRB675 can be used in Minolta Hi-Matic C/G/7sII, Ricoh Hi Color 35/35s, Vivitar 35EF, Minox B/BL, Olympus Pen D3 and many more. To achieve this longer life, the MRB675 uses a proprietary electrolyte and has only two small air holes, rather than the 7 larger holes found in standard hearing aid batteries.
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