Battery

The invention relates to a battery. A first angle (theta1) formed by the second straight line (L2) and the third straight line (L3) is larger than 55 degrees. Furthermore, the linear distance between the first point (A) and the second point (B) is defined as a first length (D1), and the length of the first electrode core located between the first point (A) and the second point (B) is defined as a second length (D2). In this case, the second length (D2) is one or more and 1.1 or less times the first length (D1). 本发明涉及电池。第二直线(L2)与第三直线(L3)所成的第一角度(θ1)大于55°。另外，将第一点(A)与第二点(B)之间的直线距离设为第一长度(D1)，将位于第一点(A)与第二点(B)之间的第一电极芯体的长度设为第二长度(D2)。此时，第二长度(D2)为第一长度(D1)的1倍以上且1.1倍以下。