mah therefore the safety effect u03be of the battery was 0 47 which is equal to that of the battery in example 27 the battery in this example has an improved charge capacity the storage characteristic of the battery was 93 which is best among all the batteries obtained in the foregoing examples a manganese based battery was prepared which contains an electrolytic solution consisting of 1m lipf 6 ec dmc 1 2 by volume 0 1m of diphenyldimethoxysilane ps4 for short hereinafter and 5 vol of hfe3 the resulting battery was found to have a charging capacity of 920 mah up to 4 2 v and an overcharging capacity of 420 mah therefore the safety effect u03be of the battery was 0 46 which is best among all the batteries obtained in the foregoing examples the storage characteristic of the battery was 93 which is equal to that of the battery in example 28 a manganese based battery was prepared which contains an electrolytic solution consisting of 1m lipf 6 ec dmc 1 2 by volume 0 1m of 4 methoxyphenyltrimethylsilane ps5 for short hereinafter and 5 vol of hfe3 the resulting battery was found to have a charging capacity of 920 mah up to 4 2 v and an overcharging capacity of 410 mah therefore the safety effect u03be of the battery was 0 465 which is best among all the batteries obtained in the foregoing examples the storage characteristic of the battery was 93 which is equal to that of the batteries in examples 28 and 29 a manganese based battery was prepared which contains an electrolytic solution consisting of 1m libf 4 ec dmc 1 2 by volume 0.