Portable storage battery internal resistance tester

The utility model discloses a portable storage battery internal resistance tester which comprises a lower main body shell and an upper main body shell, and further comprises a first outer plate and a second outer plate, and a first lifting belt and a second lifting belt are arranged in the middle of the first outer plate and the middle of the second outer plate respectively. First movable rods and second movable rods are fixedly connected to the positions, close to the two sides, of the inner side faces of the first outer plate and the second outer plate correspondingly, compression springs sleeve the outer side faces of the first movable rods and the outer side faces of the second movable rods correspondingly, and baffles are fixedly connected to one ends of the two sets of first movable rods and one ends of the two sets of second movable rods correspondingly. A first sliding groove and a second sliding groove are formed in the positions, close to the two sides, of the front side faces of the lower main body