Browse

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Pet Supplies Sporting Goods Ticket Toys Games Transportation Others

Used Cars New Cars Others

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

How to Check the Condition of a Battery

1 Answers

DeHaley

07/24/25 3:03am

Methods to check the condition of a battery are as follows: 1. Perform a startup test on the car or electric vehicle by using the key to ignite. If the vehicle fails to start after inserting the key and it hasn't been parked or discharged for a long time, it can be preliminarily judged that the battery is severely aged and needs replacement. 2. After driving the car normally for a period, if it won't be used for some time, conduct a discharge test. Turn the key to the circuit-on position and then turn on the headlights. If the headlights go out within one or two days, it indicates battery aging. During the car startup, observe electronic devices like the radio—if the sound fluctuates between loud and soft, it suggests unstable battery output. 3. Open the front engine hood and check the battery's two electrodes for white crystalline deposits. If there are many, it indicates severe battery sulfation, requiring replacement. Also, check the production date and specifications on the battery cover. If the production date is ten years or older, it is recommended not to use it. 4. Use a multimeter to test the battery voltage under no load. The voltage should be 12V and stable. If the voltage is too low or fluctuates, it indicates battery aging. 5. Connect the multimeter to the battery's positive and negative terminals, start the car, and turn on the air conditioner. Observe the voltage reading. If the voltage drops significantly, it indicates battery aging.

Was this review help?

19

0

Share

More Forum Discussions

What Are the Routine Maintenance Items for Vehicles?

Routine vehicle maintenance items mainly include the replacement of engine oil and oil filters, air filters, fuel filters, and pollen filters, as well as the maintenance and replacement of spark plugs, transmission oil, and other related system inspection and maintenance items. Vehicle maintenance refers to the preventive work of regularly inspecting, cleaning, supplying, lubricating, adjusting, or replacing certain parts of the vehicle, also known as vehicle servicing. Modern vehicle maintenance primarily includes the maintenance of the engine system, transmission system, air conditioning system, cooling system, fuel system, power steering system, etc. The purpose of vehicle maintenance is to keep the vehicle clean, maintain normal technical conditions, eliminate potential hazards, prevent faults, slow down the deterioration process, and extend the service life.

What are the reasons why the Besturn X80 remote control cannot be used?

The reasons why the Besturn X80 remote control cannot be used: 1. The time control module in the remote key fails, and the antenna of the car's remote transmitter ages; 2. Some grease in the remote becomes sticky, causing poor contact; 3. There is strong magnetic field signal interference around the parked car. The advantages of the remote control are: regardless of day or night, without the need to locate the keyhole, it can conveniently lock and unlock the car from a distance. The length, width, and height of the Besturn X80 body are 4620mm, 1820mm, and 1695mm respectively, with a wheelbase of 2675mm. The maximum power of the engine equipped in this car is 137kw, and the maximum torque is 235nm.

What Causes a Car to Fail to Start When Warm?

Reasons why a car fails to start when warm: 1. Fuel injector leakage; 2. Damaged carbon canister solenoid valve, causing an overly rich air-fuel mixture; 3. Poor fuel quality that easily evaporates, resulting in overly lean fuel vapor from the injector; 4. Faulty intake air temperature sensor; 5. Excessive carbon buildup on intake valves, throttle body, and pistons; 6. Aging ignition coils with leaking wires. Solutions for a car failing to start when warm: 1. Warm up the car for only 1 minute, no need to wait 5 to 6 minutes; 2. Engine oil becomes thicker and less fluid at low temperatures; 3. Avoid rapid acceleration while the engine is warming up; 4. Choosing engine oil with lower low-temperature viscosity can help the engine reach operating temperature faster.

Why does the reversing radar always beep?

The reasons why the reversing radar always beeps are: 1. The reversing radar probe is stuck with something, causing signal blockage; 2. The rear wiper water pipe leaks or seeps into the reversing radar system; 3. The radar ultrasonic signal is faulty, causing false alarms; 4. The reversing radar circuit is short-circuited or the radar module is malfunctioning. The method to use the reversing radar is: 1. Open the car's driver-side door; 2. Step on the car's brake pedal to prepare for engine start; 3. Turn the car's key to start the engine and let it idle; 4. The car's dashboard lights up, and the entire vehicle is powered on; 5. Press the reversing radar activation button located on the left side of the central control panel's combination switch.

Where is the sunroof switch of Volkswagen Tharu?

Volkswagen Tharu's sunroof switch is located in the front roof reading light area, where the front roof functional zone also integrates multiple functions such as welcome lights, driver's reading light, passenger's reading light, and interior light switch. The Volkswagen Tharu is a compact 5-door, 5-seat SUV with body dimensions of 4453mm in length, 1841mm in width, 1632mm in height, and a wheelbase of 2680mm. It is equipped with a 1.4T turbocharged engine and a 7-speed dual-clutch transmission, delivering a maximum power of 110 kW at 5000 rpm and a maximum torque of 250 Nm between 1750 to 3000 rpm. The drivetrain is front-wheel drive, with a front McPherson independent suspension and a rear multi-link independent suspension.

Where is the oil filter for the Mercedes-Benz B200 located?

The oil filter for the Mercedes-Benz B200 is located next to the right front shock absorber, in the right front position of the engine. The functions of the oil filter are: 1. To reduce the friction resistance between moving parts in the engine and minimize component wear; 2. To filter out debris, gum, and moisture from the engine oil. The Mercedes-Benz B200 is a compact 5-door, 5-seat hatchback with body dimensions of: length 4423mm, width 1796mm, height 1555mm, and a wheelbase of 2729mm. It is equipped with a 1.3T turbocharged engine and a 7-speed dual-clutch transmission, delivering a maximum power of 120 kW and a maximum torque of 250 Nm. The drivetrain is front-wheel drive, with a front suspension using a MacPherson strut independent suspension and a rear suspension using a torsion beam non-independent suspension.

Trending Ranking

How to Remove the Axle Shaft of a Tricycle?

How to Check Traffic Violation Fines?

How to Reset the Maintenance Light on a 2021 Corolla?

What is the difference between 91w and 95w tires?

What is the RPM when starting the car?

What should you do when encountering an oncoming vehicle occupying your lane while driving?

How to Turn Off i-stop?

Where is the BMW engine oil dipstick located?

What is the emission standard of the 2009 BYD F3?

What do the letters P, R, N, D in an automatic transmission mean?

More Forum Discussions

Is the Porsche Soft Top Convertible Afraid of Rain?

How to Choose Coolant?

What is the maximum speedometer reading for the Audi A4?

What to do with the ETC when the vehicle is sold?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.