We have a large car service that probably charges 4-6 cars a day in the winter. Before that we always bought small Schumacher chargers. The new feature, fully automatic with a microprocessor, is nonsense. We have many vehicles with batteries that we can save on charging overnight or 24 hours. These new chargers used with a 10 year old model will not charge them and indicate a bad battery, older devices will keep the battery and be fine.
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