Replacement car battery chargers are available at Walmart.com and Amazon.com. Car battery chargers at Walmart.com include the Schumacher Speed Charge 12-Amp and DieHard DH-200M. Amazon.com sells Schumacher car battery chargers such as the SE-4022 and SC10030A, as of 2015.
The Schumacher Speed Charge 12-Amp charges multiple voltages including 3 amps, 6 amps and 12 amps. The charger features a voltage detector and microprocessor that work together to charge. The DieHard DH-200M offers six charge levels including 10 amp, 40 amp, 100 amp, 200 amp and 300 amp voltages. Amazon.com's Schumacher SE-4022 is compatible with both 6-volt and 12-volt batteries and features a cooling fan. The Schumacher SC1030A offers up to 100 amps of power and charges deep cycle, gel cell and standard batteries.