Maxx Automatic Battery Charger BC50BE

Document information

EverStart Maxx Automatic Battery Charger BC50BE

The EverStart Maxx BC50BE is an automatic 12V automotive battery charger with a 15-amp charging output and a 50-amp engine-start function. It also includes battery voltage checking, alternator testing, battery reconditioning, and automatic float-charge maintenance.

The charger uses an LCD screen to display charging progress, battery status, voltage readings, operating functions, and fault indications. Its charging system automatically monitors the connected battery and switches to float-charge mode when the battery reaches a full charge.

Key Features

• 15A automatic battery charging
• 50A engine-start assistance
• 12V automotive battery charging
• Battery voltage checking
• Alternator testing
• Battery reconditioning
• Automatic float-charge maintenance
• Digital LCD status display
• Reverse-polarity warning
• Overheat and battery-fault indications
• Temperature compensation indicators

Technical Specifications

Important: The 50A rating applies to the engine-start function, not continuous battery charging. The specified charging output is 12V DC at 15A.

Important Safety Instructions

The BC50BE operates around automotive batteries that may release explosive gases during normal operation and charging. Improper connections can cause sparks, electrical shock, fire, or battery damage.

All safety precautions must be followed before operating the charger.

General Safety Precautions

• Operate the charger only as described in its instructions.
• Use the charger only for the specified 12V battery applications.
• Do not use the charger for ordinary dry-cell batteries.
• Keep the charger away from children.
• Do not expose the unit to rain, snow, or wet conditions.
• Never immerse the charger in water or another liquid.
• Do not operate near flammable liquids, gases, or fumes.
• Do not operate a damaged charger or power cord.
• Do not open the charger housing or attempt internal repairs.
• Disconnect the AC power plug when the charger is not in use.
• Store the charger in a clean, cool, and dry location.

Battery Safety Precautions

Warning: Lead-acid batteries can produce explosive gases. A spark near a battery may cause an explosion.

The following precautions apply when working near the battery:

1. Work in a well-ventilated area.
2. Keep flames, cigarettes, and sources of sparks away from the battery.
3. Wear appropriate protective eyewear.
4. Remove metal jewelry, including rings, watches, and bracelets.
5. Avoid dropping metal tools onto the battery.
6. Keep water and soap available in case of contact with battery acid.
7. Do not attempt to charge a frozen battery.
8. Do not charge the battery while the vehicle engine is operating.
9. Keep another person nearby when working with a lead-acid battery.
10. Follow the precautions provided by the battery and vehicle manufacturers.

If battery acid contacts the eyes, flush them immediately with clean water for at least 15 minutes and seek immediate medical attention.

Charger Placement

The charger must be positioned away from the battery being charged.

• Keep the charger as far from the battery as its cables permit.
• Never position the charger directly above a battery.
• Do not place the battery on top of the charger.
• Do not restrict ventilation around the charger.
• Prevent battery acid from dripping onto the charger.
• In a garage or enclosed location, position the charger at least 18 inches above the floor to reduce the risk of igniting flammable vapors.
• Marine batteries must be removed and charged on shore. The BC50BE is not designed for onboard marine-battery charging.

Electrical Safety

The charger operates from a 120V AC power supply.

The power cord includes a polarized plug. The plug must not be modified or altered to fit an unsuitable outlet.

If an extension cord is necessary, it must be suitable for the electrical load and comply with the cord specifications in the instruction manual.

Ground-fault circuit interrupter (GFCI) protection should be provided for the outlet or circuit being used.

Battery Compatibility

The EverStart Maxx BC50BE is intended for the 12V automotive battery applications described in its instruction manual.

It must not be used for charging dry-cell batteries.

The charger is not a general-purpose power supply. Compatibility with battery chemistries or systems not specified in the manufacturer’s instructions must not be assumed.

Parts and Controls

The EverStart Maxx BC50BE includes dedicated controls for charging, engine starting, battery testing, and reconditioning.

Main Components

LCD Screen Indicators

The LCD screen includes indicators for charging progress, battery status, fault conditions, and operating functions.

Before Using the EverStart Maxx BC50BE

The charger and battery must be prepared before beginning a charging cycle.

Preparing the Battery

1. Make sure the battery is in a well-ventilated location.
2. Switch off vehicle accessories when preparing to charge.
3. If the battery must be removed, disconnect the grounded battery terminal first.
4. Clean the battery terminals while avoiding contact with corrosive deposits.
5. Follow the battery manufacturer’s instructions concerning electrolyte levels and cell caps.
6. Check the battery manufacturer’s recommended charging precautions.
7. Confirm that the battery is a suitable 12V battery.
8. Inspect the charger, power cord, and clamps for visible damage.

For batteries with removable cell caps, electrolyte maintenance must follow the battery manufacturer’s instructions. Maintenance-free batteries must be handled according to their specific requirements.

How to Connect the EverStart Maxx BC50BE

The charger has different connection procedures for a battery installed in a vehicle and a battery removed from a vehicle.

The correct procedure also depends on the vehicle’s chassis-ground polarity.

Charging a Battery Installed in a Vehicle

Warning: Incorrect clamp placement can cause sparks near the battery. The correct chassis-ground arrangement must be identified before connecting the clamps.

Before connecting:

1. Position the AC and battery-clamp cables away from the hood, doors, and moving engine components.
2. Stay clear of fan blades, belts, pulleys, and other moving parts.
3. Identify the battery’s positive (+) and negative (−) terminals.
4. Determine whether the vehicle uses negative-ground or positive-ground electrical connections.

Negative-Grounded Vehicles

Most vehicles use a negative-ground electrical system.

For a negative-grounded vehicle:

1. Connect the positive red clamp to the battery’s positive (+) terminal.
2. Connect the negative black clamp to a heavy-gauge metal part of the vehicle chassis or engine block away from the battery.
3. Do not connect the chassis clamp to the carburetor, fuel lines, or sheet-metal body panels.
4. Confirm that the connections are secure before activating the charging function.

The black clamp must not be attached directly to the negative battery terminal when following this negative-grounded vehicle procedure.

Positive-Grounded Vehicles

For a positive-grounded vehicle:

1. Connect the negative black clamp to the battery’s negative (−) terminal.
2. Connect the positive red clamp to a heavy-gauge metal part of the vehicle chassis or engine block away from the battery.
3. Avoid fuel lines, the carburetor, and sheet-metal body panels.
4. Confirm that the connections are secure before activating the charging function.

Charging a Battery Removed From a Vehicle

Warning: A spark near the battery may cause an explosion. The external-battery procedure requires an additional insulated battery cable.

For a battery removed from a vehicle:

1. Identify the battery’s positive (+) and negative (−) terminals.
2. Attach a minimum 24-inch-long, AWG #6 insulated battery cable to the negative (−) battery terminal.
3. Connect the positive red charger clamp to the positive (+) battery terminal.
4. Stand as far from the battery as practical and avoid facing the battery while making the final connection.
5. Connect the negative black charger clamp to the free end of the insulated cable attached to the negative battery terminal.

The additional cable moves the final connection point away from the battery.

When disconnecting, remove the connections in reverse order after disconnecting AC power. Break the first clamp connection as far from the battery as practical.

How to Disconnect the Charger

The AC power cord must always be disconnected before the charger clamps are removed.

For a battery installed in a vehicle:

1. Disconnect the charger from the AC wall outlet.
2. Remove the clamp connected to the vehicle chassis or engine block.
3. Remove the clamp connected to the battery terminal.

For a battery removed from a vehicle, disconnect AC power first and reverse the external-battery connection procedure.

How to Use EverStart Maxx BC50BE Battery Charger

The BC50BE uses an automatic charging system and LCD display to monitor the charging process.

Step-by-Step Battery Charging Instructions

1. Prepare the battery. Confirm the battery type, voltage, and charging precautions.
2. Identify the connection arrangement. Follow the correct procedure for an installed or removed battery.
3. Connect AC power. Plug the charger into a suitable 120V AC outlet. The LCD enters its initial standby display.
4. Connect the clamps. Attach the clamps according to the appropriate polarity and vehicle-grounding procedure.
5. Check standby status. The clamp icons, arrow icons, battery icon, and gauge should display the standby indication when the connections are correct.
6. Start charging. Press the Battery Charge Button to begin charging.
7. Observe the display. The digital readout shows charging current, while the battery gauge and animated indicators show charging progress.
8. Allow charging to continue. The charger monitors the battery automatically.
9. Check completion. When charging is complete, the display shows FLO, and the battery charge gauge reaches 100%.
10. Disconnect safely. Disconnect AC power before removing the battery clamps.

The charger is designed to monitor battery condition and adjust its charging operation automatically.

How to Know if EverStart Maxx BC50BE Is Charging

During normal charging:

• The digital display indicates charging current.
• The battery charge gauge shows the battery’s progress.
• The clamp icons remain illuminated.
• The battery icon appears on the display.
• Battery-icon bars animate from empty to full.
• Arrow icons animate toward the battery icon.

The LCD display provides a visual indication that the charging function is active.

How to Know When the Battery Is Fully Charged

When the battery reaches full charge, the charger automatically enters float-charge mode.

The display shows:

• FLO on the digital readout.
• A battery charge gauge at 100%.
• A battery icon with four solid bars.
• The clamp and battery indicators illuminated.

The charger continues monitoring battery voltage while float-charge mode is active.

How Long Does the EverStart Maxx BC50BE Take to Charge a Battery?

Charging time depends on the battery’s capacity, initial state of charge, and ability to accept charging current.

The charger provides up to 15A of charging output, but the charging process is automatic rather than a fixed-duration timer.

If a battery does not reach full charge after 18 hours of continuous charging, the BC50BE stops charging and displays F04.

This is a fault condition requiring battery inspection, not a normal 18-hour charging recommendation.

Battery Voltage Check Function

The BC50BE includes a battery voltage check button for displaying the voltage of the connected battery.

Checking Battery Voltage in Standby Mode

1. Connect the charger to the battery using the correct connection procedure.
2. Make sure the charger is in standby mode.
3. Press the Battery Voltage Check Button.
4. Read the battery voltage on the LCD display.

The voltage remains visible for approximately 10 seconds.

The charger returns to standby automatically after 10 seconds. Pressing the voltage check button again also returns it to standby.

Checking Battery Voltage During Charging

1. With charging active, press the Battery Voltage Check Button.
2. The display shows the connected battery’s voltage.
3. The reading remains visible for approximately 10 seconds.
4. The charger automatically returns to charging mode.

Pressing the voltage check button again ends the temporary voltage display.

EverStart Maxx BC50BE Engine Start Instructions

The EverStart Maxx BC50BE includes a 50A Engine Start function intended to provide charging assistance before starting a vehicle.

This is an engine-start assistance function rather than a self-contained portable jump starter.

How to Use the 50-Amp Engine Start Function

1. Connect the BC50BE to the vehicle battery using the correct in-vehicle connection procedure.
2. Connect the charger to the specified AC power supply.
3. Press the Engine Start Button.
4. The LCD begins a countdown from 60 to 00.
5. Wait for the countdown to finish.
6. When the display reaches 00, the charger sounds a beep and the engine-start icon begins flashing.
7. Crank the vehicle engine according to the vehicle manufacturer’s instructions, typically in bursts lasting 3–5 seconds.
8. The LCD displays 5 sec. during the cranking period.
9. After cranking, the charger automatically changes to a 3A charging current for approximately 5 minutes before returning to normal charging mode.

Engine Start Cooling Period

The engine-start function requires a resting or cooling period between attempts.

Wait 4–5 minutes before another engine-start attempt.

The specification identifies the engine-start duty cycle as 5 seconds on and 5 minutes off.

Do not continue repeated starting attempts without the specified cooling period.

Engine Start Safety

• Check the vehicle manufacturer’s instructions before attempting external starting assistance.
• Keep clear of moving engine components.
• Use the correct battery clamp connections.
• Do not attempt to charge the battery while the engine is running.
• Follow the engine-start operating sequence and cooling period.

EverStart Maxx BC50BE Alternator Check Instructions

The Alternator Check function evaluates whether the vehicle’s alternator output is within the expected voltage range.

The procedure includes two tests: one with vehicle accessories off and another with accessory loads applied.

Alternator Check Without Electrical Load

The battery must be fully charged before performing the test.

1. Connect the charger to the vehicle battery using the appropriate instructions.
2. Switch off the vehicle’s electrical accessories.
3. Start the engine and allow it to reach normal idle speed.
4. Press the Alternator Check Button.
5. The LCD displays CHECK while analyzing the system.
6. Read the displayed result.
7. Press the Alternator Check Button again to stop the test.

Alternator Check With Electrical Load

The second test measures alternator behavior under additional electrical demand.

1. Keep the engine running at normal idle speed.
2. Switch on vehicle accessories to apply electrical load, excluding the air conditioning and defrost functions as directed by the manual.
3. Press the Alternator Check Button.
4. Wait while the display shows CHECK.
5. Review the result on the LCD screen.
6. Press the Alternator Check Button again to stop the test.

Alternator Check Display Results

The alternator check is intended for 12V vehicle electrical systems.

Its results may not be accurate for every vehicle make or model. Additional electrical accessories can also affect the result.

Note: Alternator testing is a separate diagnostic function from battery charging. The prohibition against charging while the engine is operating still applies to normal battery-charging operation.

EverStart Maxx Battery Recondition Mode

The BC50BE includes a Battery Recondition function intended to help reduce the effects of lead sulfate buildup on suitable batteries.

The function uses a series of electrical pulses as part of the reconditioning process.

Battery reconditioning does not guarantee that a damaged or worn battery can be restored.

How to Use Battery Recondition Mode

1. Connect the charger to the battery according to the correct connection procedure.
2. Press the Battery Recondition Button.
3. The battery recondition indicator and related LCD icons illuminate.
4. The battery-icon bars animate from full to empty.
5. The reconditioning icons flash while the function operates.
6. Allow the programmed reconditioning cycle to run.

The cycle stops automatically after approximately 24 hours.

How to Stop Reconditioning

Press the Battery Recondition Button again to stop the cycle before its scheduled completion.

During reconditioning, the other function buttons do not control the active process.

After the 24-hour cycle, the charger automatically returns to charging mode.

Battery Reconditioning Limitations

The original instruction manual allows repeated reconditioning cycles when a battery requires additional treatment.

However, if five reconditioning cycles do not improve battery performance, reconditioning must be discontinued and the battery recycled.

Reconditioning cannot be assumed to repair internal battery damage.

Float Charge and Battery Maintenance

The BC50BE automatically enters float-charge mode when the battery is fully charged.

In this mode, the charger monitors battery voltage and supplies charging current when necessary to maintain a full state of charge.

How Float Charge Mode Works

1. The battery reaches full charge.
2. The charger enters float-charge mode automatically.
3. The display shows FLO.
4. The battery gauge indicates 100%.
5. The charger monitors battery voltage and maintains the charge as needed.

Float-charge mode continues while the charger remains correctly connected to the battery and a working AC outlet.

The BC50BE’s 50A engine-start rating must not be confused with its ordinary charging or battery-maintenance operation.

EverStart Maxx BC50BE Display Codes and Indicator Lights

The LCD screen communicates charging activity, completed functions, and fault conditions.

What Does FLO Mean on EverStart Maxx Battery Charger?

FLO means the battery charger has entered float-charge mode.

It appears when the battery is fully charged. The charger continues monitoring battery voltage and supplies maintenance charging when necessary.

The battery gauge displays 100% while float-charge mode is active.

What Does F04 Mean on EverStart Maxx Battery Charger?

F04 indicates that the connected battery did not reach full charge after 18 hours of continuous charging.

The charger stops the charging process automatically.

The battery may have internal damage or may no longer accept a normal charge.

The required response is to disconnect the charger and have the battery inspected by a qualified technician.

What Does a Flashing Clamp Symbol Mean?

Flashing polarity symbols accompanied by an audible alarm indicate an incorrect battery clamp connection.

The charger must not be activated while this warning is present.

Disconnect AC power, remove the clamps, and reconnect them using the correct polarity procedure for the battery and vehicle arrangement.

What Does the Overheat Icon Mean?

The overheat indicator shows that the charger has become too hot.

Disconnect the charger and allow it to cool for several minutes. Confirm that ventilation is adequate before attempting further operation.

EverStart Maxx BC50BE Troubleshooting

The following checks address faults and operating conditions described in the BC50BE instruction manual.

EverStart Maxx Battery Charger Not Charging

If the BC50BE does not begin charging:

1. Check that the battery clamp connections are secure.
2. Confirm that the AC outlet supplies power.
3. Verify that the battery is compatible with the specified 12V charging system.
4. Check the LCD for polarity or fault warnings.
5. Confirm that the battery voltage is not below the unit’s minimum charging threshold.

Important: A battery with voltage below 2V cannot be recharged using this charger, according to the instruction manual.

EverStart Maxx Battery Charger Beeping

A continuous warning sound may indicate that the battery clamps are connected with incorrect polarity.

When this occurs:

1. Do not activate the charging function.
2. Unplug the charger from the AC outlet.
3. Remove the clamps safely.
4. Reconnect them following the appropriate installed-battery or removed-battery procedure.

EverStart Maxx Battery Charger Showing F04

The F04 indication occurs after the charger has attempted to charge a battery continuously for 18 hours without reaching a full charge.

The charger stops the charging process.

Disconnect the equipment and have the battery checked by a qualified technician. Do not assume that repeated charging attempts will resolve the underlying fault.

EverStart Maxx Battery Charger Overheating

When the overheat warning appears:

1. Disconnect the charger from its power supply.
2. Allow it to cool for several minutes.
3. Check that the ventilation openings are unobstructed.
4. Make sure the charger is positioned in a suitable, well-ventilated area.

If overheating continues, discontinue operation and contact the manufacturer.

Cleaning and Maintenance Instructions

The BC50BE requires periodic inspection and cleaning to maintain safe operation.

How to Clean the Charger

Warning: Unplug the charger and disconnect it from the battery before performing cleaning or maintenance.

1. Disconnect the AC power plug.
2. Remove the battery clamps using the correct disconnection procedure.
3. Clean the charger housing with a dry cloth.
4. Wipe the power cord and cables as necessary.
5. Inspect the cables, clamps, and housing for wear or damage.
6. Keep the equipment dry.

The charger must never be immersed in water.

Cable and Clamp Maintenance

The power cord and charging cables must be handled carefully.

• Do not pull the equipment by its power cord.
• Disconnect the power cable by pulling the plug rather than the cord.
• Keep cables away from heat, oil, and sharp edges.
• Check cables for visible deterioration.
• Do not operate with damaged clamps or cords.
• Do not attempt unauthorized electrical repairs.

Storage Instructions

For storage:

1. Disconnect the charger from the battery and AC power.
2. Allow the unit to cool if necessary.
3. Coil the cables loosely.
4. Do not wrap the cords tightly around the charger or secure them with tight bands that may cause crimping.
5. Store the equipment in a clean, dry, and cool location.

Replacement Parts and Accessories

Replacement parts and recommended accessories may be available through Baccus Global.

Only accessories recommended for use with the charger should be used.

The charger has no user-serviceable internal components. Damaged or defective electrical parts must be handled through qualified service or the manufacturer.

Warranty Information

The original BC50BE instruction manual includes a two-year limited warranty covering eligible defects in materials and workmanship.

The warranty period begins on the original retail purchase date.

Warranty Coverage

The manufacturer’s warranty provides for repair or replacement of an eligible defective product.

Proof of purchase may be required.

Warranty service may be available through the manufacturer or a participating retailer, subject to the applicable conditions and return policies.

Warranty Exclusions

The original warranty excludes:

• Normal wear and tear
• Accidental damage
• Damage during shipping
• Unauthorized alterations or repairs
• Misuse and abuse
• Negligent handling
• Failure to follow care and maintenance instructions
• Certain accessories and consumable items, including batteries and fuses

The warranty is intended for the original retail purchaser.

The product is not intended for commercial use.

Customer Support Information

Baccus Global LLC is identified as the importer and manufacturer support contact for the EverStart Maxx BC50BE.

The customer service phone number is printed in the instruction manual. The email address and support link are provided through Baccus Global’s current contact page.

For questions about repairs, accessories, warranty claims, or replacement components, contact the manufacturer and provide the model number BC50BE.

Frequently Asked Questions

1. How do you use the EverStart Maxx BC50BE battery charger?

Connect the charger according to the correct installed-battery or removed-battery procedure. Connect to the specified 120V AC supply, press the Battery Charge Button, and monitor the LCD display. Charging completes when the screen shows FLO and the battery gauge reaches 100%.

2. Is the EverStart Maxx BC50BE a 15-amp or 50-amp charger?

The BC50BE provides a rated charging output of 15A and a separate 50A engine-start function. The 50A rating applies to engine-start assistance, not continuous battery charging.

3. What does FLO mean on an EverStart Maxx battery charger?

FLO indicates float-charge mode. It appears when the battery is fully charged and the charger is maintaining battery voltage automatically.

4. What does F04 mean on an EverStart Maxx BC50BE charger?

F04 indicates that the battery did not reach full charge after 18 hours of continuous charging. The charger stops the cycle, and the battery should be checked by a qualified technician.

5. How do you use the alternator check on EverStart Maxx BC50BE?

Connect the charger correctly, make sure the battery is fully charged, and run the engine at normal idle speed. Press Alternator Check to begin testing. CHECK means testing is in progress, GOOD means output is within the expected range, and ALT with the fault icon indicates voltage outside the typical range.

6. How do you use battery recondition mode on BC50BE?

Connect the charger correctly and press the Battery Recondition Button. The cycle operates for up to 24 hours before returning to charging mode. Press the button again to stop it early. If five cycles do not improve the battery, discontinue reconditioning and recycle the battery.

7. How do you use the EverStart Maxx BC50BE 50-amp engine start?

Connect the charger to the vehicle battery using the correct procedure, then press the Engine Start Button. The display counts down from 60 to 00. After the beep, crank the engine in accordance with the vehicle manufacturer’s instructions, typically for 3–5 seconds. Allow 4–5 minutes between attempts.

8. Why is the EverStart Maxx BC50BE not charging the battery?

Possible causes include an insecure connection, unavailable AC power, an incompatible battery, or battery voltage below 2V. Check the LCD for fault indicators. If the battery fault warning or F04 code appears, disconnect the charger and have the battery inspected by a qualified technician.