I had that happen to me and the cable terminal was toast as well. One battery was pretty much shot, and all the cable terminal ends were just... bad. I found out that to replace everything the cheapest capable rout was a set of commercial truck batteries with the 3/8 studs on top NAPA #7236, you just put the wire in and tighten it down with a ratchet, no shoving terminal ends in place, no cracked, crumbling lead, and no obnoxious corrosion, works like a champ, cost me $200 for the pair of batteries, and I just had to take the cable terminal ends off, and use the already existing crimped on ring connector to go on the studs. The batteries each have 1190 CCA. I'm not concerned about starting problems anymore.