A　new　type　of　full　solid　state　cell　has　been　manufactured　by　using　gel　polymer　electrolyte　membrane　containing　water　(referred　It,　its　GPE)　as　positive　electrode　material.　GPE　consists　of　poly(methyl　acrylic　acid),　poly(methyl　acrylic　lithium)　and　glycerol　whose　weight　ratio　is　3:2:3.　A　cell　of　magnesium　water　has　been　manufactured.　The　open　circuit　voltage　of　cell　is　1.4-1.7　V,　The　short　circuit　current　is　0.05-1.7　mA　The　discharge　capacity　is　6　mAh/g　under　constant　load　resistance　of　5.2　K　Omega.