Corroded battery ends and contacts in the original battery holder. The more deeply you can unwind wires from the holder before cutting, the more wire you’ll have to work with when soldering. (Daniel J. Schneider)
Corroded battery ends and contacts in the original battery holder. The more deeply you can unwind wires from the holder before cutting, the more wire you’ll have to work with when soldering. (Daniel J. Schneider)