How To Tell If Something Is Draining Your Car Battery. The battery itself has gone bad and just cant hold a charge long enough to be of any use after the vehicle sits and it drains. Car stereo drains car battery it is recommended that you keep your car battery fully charged.
Connect the red wire to the 10A20A input port on your multimeter. Car stereo drains car battery it is recommended that you keep your car battery fully charged. Is something draining your cars battery.
Then take your voltmeter and attach it across the battery terminals red to and black to -.
In other words a car battery drains when it is not charged enough which is a common problem when using powerful amplifiers. If youre draining a car battery by powering a device just keep in mind that a car battery will likely have about 600-720 watt-hours 12v battery 50 or 60 amp hours volts amps watts. There is a drain on the battery like something is left. Connect the red wire to the 10A20A input port on your multimeter.
