Electronic charger Goodyear CH-4A Smart (article number GY003001) for lead-acid automotive batteries with an intelligent charging management system, winter mode, and recovery mode for deeply discharged batteries, presented in the format of an instruction in questions and answers.



Goodyear CH-4A Smart charger appearance and front panel layout for FAQ section

Questions and Answers on the Goodyear CH-4A Smart Charger

This section contains frequently asked questions regarding the selection of charging modes, connection to the battery, operation in winter mode, and the use of battery recovery functions for the Goodyear CH-4A Smart charger.

Reviews and user experience of the Goodyear CH-4A Smart charger ›››

Technical Specifications of the Goodyear CH-4A Smart Charger

What are the main electrical characteristics of the Goodyear CH-4A charger?

The Goodyear CH-4A charger is designed for operation from a 220 V AC mains supply and provides an output voltage of 6 V or 12 V. The maximum charging current at 6 V is approximately 2 A, and at 12 V approximately 4 A. The rated power consumption is about 70 W. The device is intended for charging batteries with battery capacity in the range of approximately 3 to 120 Ah.

Can the Goodyear CH-4A charge 24 V batteries or be used as a jump starter?

No, the Goodyear CH-4A charger is intended only for 6 V and 12 V starter lead-acid batteries and does not support 24 V systems. It does not have a jump-start function and is not capable of delivering the required cranking current to start an engine directly.

Does the Goodyear CH-4A have a built-in battery and can it operate without a 220 V mains supply?

The Goodyear CH-4A does not have a built-in battery and operates only when connected to a 220 V mains supply. Without mains power, charging is not performed, and engine starting from the charger itself is not possible.

What is the maximum charging current and the approximate charging time for a 60 Ah battery?

The maximum charging current of the Goodyear CH-4A for 12 V batteries is approximately 4 A. At this current, a fully discharged automotive battery with a capacity of about 60 Ah will be charged in approximately 12 hours. This is a typical charging time for an automatic charger with a current of up to 4 A.

What is the degree of protection of the Goodyear CH-4A charger housing?

The charger housing has a degree of protection according to the IP standard (Ingress Protection rating) IP65. This means protection against dust and water splashes. The device is resistant to incidental droplets and dust; however, it must not be immersed in water or left under direct rain exposure.

Does the Goodyear CH-4A have a fan and how is cooling implemented?

The Goodyear CH-4A does not have forced ventilation (fan cooling). Cooling is achieved naturally through the housing; therefore, during operation it is important not to cover the device and to ensure unobstructed air circulation.

What is the quality of the housing, cables, and clamps of the Goodyear CH-4A charger?

Practical use has demonstrated that the housing is well manufactured and creates a neat overall impression. The cables leading to the clamps appear relatively thin; however, the standard clamps are sufficiently robust and convenient for operation. If necessary, the user may additionally protect the wiring from bending and mechanical damage.

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How is the charging process and full charge displayed on the Goodyear CH-4A screen?

The charger is equipped with a small LCD display. The screen shows the main charging parameters and service messages. For improved visual perception, the display changes color. A fully charged battery is indicated by a blue display color or by the appearance of the inscription FUUL (FUL) on the screen, depending on the device revision.

What is the difference between the “FUUL” indication and a simply blue screen in different versions of the Goodyear CH-4A?

In earlier production versions, the completion of charging is indicated by the screen turning blue without any text inscription. In versions produced approximately since 2022, the inscription FUUL is additionally displayed when the battery is fully charged. In both cases, this indicates that the charger has switched to storage mode and that the main charging phase has been completed.

What does a rapid transition of the Goodyear CH-4A to FUL/FUUL status or a blue screen within 10–30 minutes mean?

A rapid transition to FUL/FUUL mode or to a blue screen only indicates that the charger has identified the battery as already charged or unable to accept current. This may occur in the presence of significantly increased battery internal resistance, pronounced plate sulfation, or overall battery wear. In such cases, the device correctly terminates the main charging phase in order to avoid damaging the battery.

Why can the battery remain undercharged even though the Goodyear CH-4A indicates FUL/FUUL?

Undercharging is possible in the presence of increased battery internal resistance, reduced electrolyte density, partial plate sulfation, or general battery wear. The battery design, for example PowerFrame-type grids, also affects the result. The charger terminates the main charging phase upon reaching the target voltage and current parameters and does not attempt to force additional charging of a potentially defective or severely degraded battery.

Can the automatic Goodyear CH-4A charger undercharge serviceable batteries?

The Goodyear CH-4A is intended for automatic recharging and maintenance of standard lead-acid batteries. According to user feedback, when full charging cycles are performed infrequently, the device may leave the battery in a state of slight undercharge, which may potentially affect service life and winter starting performance. For achieving a максимально full manual charge, conventional transformer chargers with adjustable current and voltage are sometimes used.

Why does the Goodyear CH-4A maintain a voltage of approximately 14 V for a prolonged period and then switch off?

This behavior is normal. During the final stages of charging, the device maintains an elevated voltage at the battery terminals in order to bring the charge to the required level. The charger then switches to storage and maintenance mode, periodically supplying a small current to compensate for battery self-discharge.

Can the Goodyear CH-4A fully charge large batteries with a capacity of 100–110 Ah?

The charger is designed to operate with batteries of up to 120 Ah capacity and is capable of charging 100–110 Ah batteries. However, due to the limited charging current, the process will be lengthy, and in heavily worn or deeply sulfated batteries, the increase in electrolyte density may be incomplete.

How slowly does the Goodyear CH-4A charger operate, and is this normal?

To protect the battery, the Goodyear CH-4A charges it with a relatively low current, especially during the initial and final stages. As a result, charging a deeply discharged battery may take 24 hours or more. For this type of automatic charger, such a duration is considered normal and corresponds to its principle of avoiding harm to the battery.

How automated is the device, and what must the user do when operating the Goodyear CH-4A?

The Goodyear CH-4A uses microprocessor control that independently selects charging modes, monitors parameters, and responds to abnormal situations. The user only needs to connect the clamps to the battery terminals while observing correct polarity and then connect the charger to the mains supply; the process thereafter proceeds automatically.

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How does the automatic multi-stage charging mode operate in the Goodyear CH-4A?

The Goodyear CH-4A charger implements a seven-stage charging algorithm. The stages are performed sequentially and include gentle recovery of a deeply discharged battery, pulsed charging, main charging up to approximately 75–80 %, absorption at low current up to 100 % capacity, diagnostics of charge retention capability, a finishing cyclic mode, and subsequent storage. Such an algorithm ensures careful treatment of the battery and reduces the risk of plate damage.

How does the Goodyear CH-4A charge deeply discharged batteries with a voltage of 6–8 V?

When the voltage has dropped significantly, the device initially applies low currents and, if necessary, identifies the battery as 6 V, switching to the corresponding mode. In this case, voltage increase and recovery may take up to 24 hours or more. After reaching the threshold voltage, the charger automatically switches to the standard 12 V mode and continues charging.

Why does the Goodyear CH-4A identify some deeply discharged batteries as 6 V and charge them for a very long time?

If the voltage of a deeply discharged 12 V battery is close to 6 V, the charger interprets it as a 6 V battery and activates a gentle mode with reduced current. In this mode, charging may last up to two days until the voltage rises above the switching threshold, after which the device transitions to the standard algorithm for 12 V batteries.

Is the Goodyear CH-4A suitable for recovering deeply discharged or “dead” batteries?

The charger is capable of restoring deeply discharged batteries with a voltage of approximately 6–8 V; however, it is not intended for the recovery of completely destroyed or heavily sulfated batteries. In the presence of pronounced plate sulfation or mechanical damage to the battery, charging may not restore its performance characteristics.

What does automatic shutdown of the Goodyear CH-4A shortly after charging begins indicate?

A short charging period followed by a rapid transition to FUL/FUUL mode usually indicates one of two conditions: either the battery is close to full charge, or it has issues and is practically unable to accept current. In the latter case, the cause may be increased battery internal resistance, severe wear, or plate damage.

Can the Goodyear CH-4A be left connected for long-term charge maintenance?

Yes, the Goodyear CH-4A supports a storage mode and allows prolonged connection to a serviceable battery. After completion of the main cycle, the device switches to periodic current pulses to compensate for battery self-discharge without overcharging the battery.

Is the Goodyear CH-4A suitable for year-round use, including winter conditions?

Yes, the charger is equipped with a winter charging mode that optimizes parameters when the ambient temperature is below 0 °C. This ensures correct charging of automotive batteries during cold weather conditions.

With which types of lead-acid batteries is the Goodyear CH-4A charger compatible?

The Goodyear CH-4A supports charging of conventional flooded WET and maintenance-free MF batteries, batteries manufactured using Ca/Ca calcium technology, EFB batteries, as well as AGM and GEL batteries. The capacity of supported batteries should be approximately within the range of 3–120 Ah.

Can the RECOND mode be used for maintenance-free batteries, and for which battery types is it not suitable?

The RECOND function is compatible with most maintenance-free lead-acid batteries; however, it is not recommended for AGM and GEL batteries. For these battery types, the standard automatic charging mode without recovery should be used.

Is it possible to charge a battery without removing it from the vehicle using the Goodyear CH-4A?

Yes, the charger allows operation with a battery installed in the vehicle. Standard safety precautions must be observed, the wiring condition should be monitored, and, if possible, high-power consumers should be disconnected during charging.

Is the Goodyear CH-4A suitable for motorcycle and other small-capacity batteries?

The charger is suitable for servicing motorcycle and other small 6 V and 12 V lead-acid batteries within the specified capacity range. However, the standard clamps are relatively large; therefore, for small terminals an adapter or replacement with more compact clamps may be required.

Can the Goodyear CH-4A charger be used for various types of equipment, not only for automobiles?

Yes, the Goodyear CH-4A is suitable for charging lead-acid batteries used in passenger cars, motorcycles, snowmobiles, and other equipment operating on 6 V or 12 V batteries. Provided that the capacity range is observed, the device may be used as a universal charger for household applications.

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What functions are displayed on the Goodyear CH-4A screen, and does it show the charge level?

The LCD display of the Goodyear CH-4A shows the selected mode, the current charging stage, the approximate charge level, as well as service messages and error codes. The user can visually monitor the progress of the process and determine the stage at which the battery is currently operating.

Does the Goodyear CH-4A display the actual accepted battery capacity in ampere-hours?

No, the charger does not measure or display the number of accepted ampere-hours on the screen. The Goodyear CH-4A monitors voltage and current parameters but does not provide a comprehensive analysis of battery condition or the actual restored battery capacity.

What is the purpose of the single button on the housing of the Goodyear CH-4A?

The housing is equipped with one membrane control button. It is used to select or adjust operating modes, including activation of the winter cold-charging mode. In most cases, the user only needs to select the required mode once; further operation proceeds automatically.

How should the Goodyear CH-4A charger be properly connected and switched on?

Before starting operation, it is necessary to study the manufacturer’s instructions. The clamps of the charger should then be connected to the battery terminals while observing correct polarity, ensuring reliable contact, and only after that should the Goodyear CH-4A be connected to the 220 V mains supply. The charging mode is selected using the button in accordance with the operating manual, after which the process continues automatically.

Is it possible to charge a battery using the Goodyear CH-4A in an apartment or residential premises?

Continuous charging of a conventional lead-acid battery in residential premises is not recommended, as hydrogen and harmful gases may be released during charging. It is safer to perform charging on a balcony with an open window or in a well-ventilated non-residential area, strictly observing safety instructions.

What safety measures must be observed when using the Goodyear CH-4A?

When operating the Goodyear CH-4A, it is important to observe correct polarity, prevent short circuits, avoid using the device if there is visible damage to cables or the housing, and not operate it in explosive or highly humid environments. Spark formation near the battery should be avoided, and the requirements of the instructions and operating manual must be strictly followed.

For whom is the automatic Goodyear CH-4A charger optimally suited?

The Goodyear CH-4A is primarily suitable for users who do not wish to study the specifics of battery charging in depth. It is sufficient to connect the clamps and plug the device into the mains supply; the charger will automatically select the necessary parameters. For most household tasks related to maintaining an automotive battery, this is sufficient.

Is the Goodyear CH-4A suitable for users who wish to manually set current and voltage and control desulfation?

No, the Goodyear CH-4A is a fully automatic electronic charger and does not provide manual adjustment of current and voltage. The user cannot forcibly set desulfation modes or modify the operating algorithm, unlike conventional transformer chargers with adjustable parameters, which are preferred by users requiring full manual control.

How does the Goodyear CH-4A respond to incorrect battery connection and short circuit?

The charger is equipped with protection against reverse polarity, short circuit, and overload. In the event of incorrect polarity, a warning is displayed on the screen and charging does not start. In the event of a short circuit, the device stops supplying current, thereby increasing operational safety.

What symptoms indicate battery problems when using the Goodyear CH-4A?

Signs of battery problems include a rapid transition of the charger to FUL/FUUL mode at a low actual charge level, the absence of noticeable voltage increase or charge level growth on the display, and repeated diagnostic error indications. In such cases, it is recommended to test the battery using specialized equipment and to assess the electrolyte density and possible plate sulfation.

Can the Goodyear CH-4A measure battery voltage without being connected to the mains?

Yes, the device is capable of measuring the voltage at the battery terminals in a non-mains mode and displaying the value on the screen. Based on the voltage reading, the battery condition may be preliminarily assessed before charging begins.

What are the main numerical parameters and operating modes of the Goodyear CH-4A in summarized form?

The Goodyear CH-4A charger is designed for operation from a 220 V mains supply, provides output voltages of 6 V and 12 V, has a maximum charging current of approximately 2 A for 6 V and approximately 4 A for 12 V, a rated power consumption of about 70 W, and is intended for battery capacity in the range of approximately 3–120 Ah. For deeply discharged 12 V batteries, the device may initially operate in 6 V mode for up to 24 hours or more and then switch to the standard mode. A full charge of a 60 Ah automotive battery in automatic mode typically takes approximately 12 hours.

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