How long does it take to charge a 12v maintenance-free battery?

1 Answers
CarmenLynn
07/30/25 4:39am
12v maintenance-free battery charging time is approximately 20 hours. Here is the relevant introduction about 12v maintenance-free batteries: 1. Features: Due to structural advantages, maintenance-free batteries consume very little electrolyte and basically do not require distilled water replenishment during their service life. They also feature shock resistance, high temperature resistance, compact size, and low self-discharge. The service life is generally twice that of conventional batteries. 2. Charging method: Maintenance-free batteries can also be recharged, and the charging method is basically the same as that of conventional batteries.
Was this review help?
13
4
Share
More Forum Discussions

What Causes Fogging on Car Windows in Summer?

The reason for fogging on car windows in summer is due to the low temperature setting of the car's air conditioning, which creates a large temperature difference, and the incorrect direction of the air conditioning airflow. Use Anti-Fog Spray: Spray a small amount of anti-fog spray on the inner surface of the car windows and wipe it clean. This will remove dirt and stains from the windows while forming a thin, transparent protective film that effectively prevents the formation of fog caused by condensation. This method is particularly suitable for cold winters. Blow Cold Air for Convection: Turn on the air conditioning and direct cold air toward the front windshield. Using the air conditioning's dehumidification function, the fog on the windshield can be removed quickly. However, if the humidity is too high and the air conditioning is not effective enough, slightly opening the window can help rapidly reduce the humidity inside the cabin.
19
5
Share

Where to Add Transmission Oil for BAIC Senova?

The transmission oil filling port for BAIC Senova is located at the bottom of the transmission. There are two screw ports in this position - one is the drain plug screw and the other is the fill plug screw. After unscrewing the fill plug, you can add transmission oil. Here is additional information: 1. It should be noted that when replacing new transmission oil, the old transmission oil needs to be completely drained first. Loosen the screw to let the dirty oil flow out completely, wipe the drain port clean, tighten the screw back, and then you can add new transmission oil. 2. The replacement cycle for transmission oil is two years or 60,000 kilometers. The replacement cycle of transmission oil is calculated in the same way as the car maintenance cycle, mainly based on the vehicle's mileage and usage time, but it also needs to be determined according to the actual usage condition of the vehicle. Function of transmission oil: Transmission oil mainly serves to lubricate and clean. During operation, it can protect the transmission and extend its service life. The quality of transmission oil directly affects the working efficiency of the transmission. It also has certain antioxidant properties, which to some extent reduces component corrosion.
14
1
Share

Why is there water leaking under the car?

Water dripping under the car is a normal phenomenon. Here are the specific reasons for water dripping under the car: 1. Air conditioning condensation: Dripping occurs after running the air conditioning for a while, which is normal. This happens because during air conditioning operation, moisture in the cabin condenses on the evaporator to form water droplets, which are then discharged outside the vehicle through the drain pan and drain pipe. 2. Exhaust emissions: When gasoline is injected into the cylinder and mixed with air, it fully combusts in the combustion chamber, primarily producing carbon dioxide and water. Some of this water is emitted into the atmosphere as gaseous water vapor at high temperatures, while some is discharged in liquid form.
8
2
Share

What to Do After Paying Off a Car Loan?

After paying off the car loan, you should contact the lending bank within 10 working days after the final payment is made to obtain the loan clearance certificate and retrieve the mortgaged documents. Below are the required materials for handling the vehicle release procedure: 1. Vehicle-related documents: Original "Vehicle Registration Certificate" and "Motor Vehicle Mortgage Registration/Pledge Filing Application Form," stamped with the official seal of the mortgagee. 2. Borrower-related documents: Identity proofs and copies of both the vehicle owner and the mortgagee, along with a power of attorney from the mortgagee stamped with the official seal.
14
2
Share

Should the Mustang use 92 or 95 octane gasoline?

According to the official vehicle manual recommendation, the Mustang should use 92 octane gasoline. In addition to checking the appropriate gasoline grade in the vehicle manual, the Mustang's fuel cap also indicates the recommended octane rating. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of new technologies, the compression ratio alone cannot determine the required gasoline grade. High compression ratio engines can still be tuned to use lower octane gasoline because factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline octane rating, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the Mustang occasionally uses the wrong gasoline grade, simply switch back to the correct grade after the current tank is used up. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower octane gasoline, using higher octane gasoline will not cause damage, but the increase in octane number may alter the fuel's ignition point, leading to delayed combustion in the engine. This results in reduced engine power and thermal efficiency, manifesting as poorer performance in actual driving experience. For vehicles recommended to use higher octane gasoline, using lower octane gasoline can cause engine knocking. Due to the significantly lower octane number, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance is generated during the upward stroke. This resistance makes the engine run very unstably. Mild knocking only increases noise without significant engine damage, but severe knocking indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.
9
1
Share

What are the disadvantages of double-wishbone independent suspension?

The disadvantages of double-wishbone independent suspension are that it occupies a large space and has high costs. Below is relevant information about independent suspension: 1. Function of independent suspension: As a connecting force-transmitting component between the frame (or body) and the axle (or wheels), the independent suspension of a car is also an important part to ensure driving safety. 2. Classification of independent suspension: Independent suspension is divided into two main categories: single-wishbone independent suspension and double-wishbone independent suspension. 3. Advantages of independent suspension When the wheels on both sides of an independent suspension are impacted, they do not affect each other. Moreover, due to the lighter weight of this suspension and its strong buffering and shock absorption capabilities, the ride comfort is relatively good.
7
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.