A trickle charger is a car battery charger designed to be left on a car for a long period of time to re-charge the battery. It slowly adds the charge to the battery and does not allow for the normal depletion of charge that batteries commonly have. read more
Charging a 12-volt battery with 450 cold cranking amperes and a 5-ampere charge rate takes about nine hours. The length of time required to charge a battery varies with the voltage, the charge rate and the CCA capacity of the battery. read more
How to Trickle Charge a Car Battery by Meg Jernigan The lead-acid batteries found in cars and other motor vehicles provide a high current when called upon and are recharged by the car's alternator during operation. read more