Patent ID: 8318337

Claim:
A battery comprising: an electrode assembly comprising a first electrode and a second electrode which are laminated or wound with a porous insulating layer interposed therebetween; a non-aqueous electrolyte; a battery case housing the electrode assembly and the non-aqueous electrolyte; a first lead connecting the first electrode with a bottom of the battery case by welding; a seal member sealing an opening of the battery case; and a second lead connecting the second electrode with the seal member by welding, wherein at least one of the first lead and the second lead has a high resistant portion that has a higher resistance than the other portions per unit length in the longitudinal direction of the lead, the high resistant portion is disposed at a position of the first lead closer to the first electrode than the welded portion connected to the bottom of the battery case or at a position of the second lead closer to the second electrode than the welded portion connected to the seal member, and the high resistant portion is not welded but in contact with the battery case or the seal member.