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.

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!
  • Home
  • Questions
  • can i charge my car battery with car cables still connected and charger machine on

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: Engine part prices (AUS)

Billing question sent to CS for the cost of purchasing an engine for a 1990 Volkswagen Trakka.

Q: Bolt spins inside steering rack.

Hi there. Try putting a pry bar against the part and prying on the part as you turn the bolt. This will put pressure on the bolt as it was probably stripped out when installed before. If you need further...

Q: Car won't start and check engine light on

Hello. A no start, click sound condition like the one you describe, is usually caused by a low battery. It may be possible that your battery has enough power to run your accessories, but not enough to start the engine....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...