Battery and electronic apparatus

A battery, comprising:

• a case of a flattened substantially rectangular plate shape having a thickness, a width in a leftward and rightward direction having a greater dimension than the thickness and a length in a forward and backward direction having a greater dimension than the width;
• a battery cell accommodated inside said case;
• a connector section formed near a first end portion in a widthwise direction on one of faces at the opposite ends of said case in a lengthwise direction and projecting in the lengthwise direction, the connector section including a connector wall section that protrudes in the lengthwise direction from the one end face of said case, wherein the connector wall section is directly connected to and abuts the connector section on at least three sides thereof;
• and
• a first wall portion abutting the connector section and extending from a first end of the connector section to a second end portion of the case in the widthwise direction;
• a second wall portion to discriminate a battery characteristic, the second wall portion being disposed laterally and directly adjacent in lengthwise direction to the connector section such that the second wall portion directly abuts the connector section and extends from a second end of said connector section to the first end portion in the widthwise direction on one end face of the case, the second wall portion protruding beyond the first wall portion in the lengthwise direction.