Skip the auto shop - Our mechanics make house calls

Q: can i charge my car battery with car cables still connected and charger machine on

asked by on

battery is low so i want to charge with electric charger

My car has 250000 miles.
My car has an automatic transmission.

A: You should not have a problem as long as yo...

You should not have a problem as long as you charge at a low rate and do not turn on the key while charger is on. A lot of people use a trickle charger to keep their battery topped off when a vehicle is not driven much. If you have a bad battery and need to put the charger on high then I would recommend disconnecting the battery. If you’re having battery issues, a certified mobile mechanic from YourMechanic can provide an inspection at your home or office.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Miata is giving difficulty and grinding when changing gears.

The clutch might not be disengaging all the way due to the hydraulic system not pressing the clutch all the way in or the pressure plate is failing. You should be able to from a stand still and engine running...

Q: Exhaust manifold pipe rusted off.

Hey there, thanks for writing in. You would need to have it metal clamped or welded on at an exhaust shop. Welding it will give you a better seal if the rest of the pipe is not damaged or rusted....

Q: Carbon fouled #3 and computer shows misfire on #3

If the car is running fine then it will more than likely have an exhaust leak. If the engine is starting to run a little rough again then it may have a valve issue in that cylinder. I would usually...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...