Slow battery chargers may take several hours to complete a charge. High-rate chargers may restore most capacity much faster, but high-rate chargers can be more than some battery types can tolerate. Such batteries require active monitoring of the battery to protect them from overcharging. Electric vehicles ideally need high-rate chargers. For public access, the installation of such chargers and the distribution support for them is an issue in the proposed adoption of electric cars.

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