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Maintaining Battery ChargeIt is not uncommon for most batteries to "self-discharge" over time. There are a few ways to maintain the battery's charge:
  • Start the vehicle about once every two weeks, and allow it to idle for about 10 to 15 minutes. This will allow the alternator to charge the battery, and allow time for the engine and coolant to fully heat up to normal operating temperature, and to circulate lubricating oil throughout the engine which will help protect the engine's internal parts from corrosion.
  • If you can't or don't want to start and run the engine, then you can buy a small, inexpensive charger designed just for keeping the battery charged. This type of charger is called a "Trickle Charger" and puts out just enough current [about one Ampere (Amp)] just to maintain an already fully chargedbattery. To power the Trickle Charger it plugs into an ordinary 110-120 Volt electrical receptacle.
  • You could also use an ordinary battery charger IF it hasa trickle charge mode of operation. This charger also gets power from an ordinary household receptacle.
  • Another option is to buy a Solar Trickle Charger [uses Photovoltaic cells]. With the solar trickle charger you just plug it into the cigarette lighter socket and then lay solar cell panel on top of the dashboard where it can get at least a few hours of sunlight daily.
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Q: How do you keep car battery charged while away?
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