Does this charger have a repair mode?

Yes, our chargers have a one-click repair mode, which is only applicable to 12V batteries, not 24V, and it gradually recovers the sulfurized plates by charging at low current for a long period of time to restore the performance of the battery.

What are the output voltage and full charge voltage of the charger?

Output voltage 12V- Full charge voltage 14.4V,Output voltage 24V - Full charge voltage 28.8v.

What to do if the battery is often not fully charged?

ls the battery aging or damaged, causing excessive discharge and insufficient charging? You can try the one click repair mode to repair the battery for free.

Is it a jump starter?

No, it is a battery charger and maintainer, not a jump starter.

Can it charge a 0V battery?

Yes, you can start charging if you use the repair mode when the battery voltage is 0V.pls Note: It can not repair a totally dead battery.

Lvyuan 12v 24v Car Battery Charger With Trickle Charger Automotive

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

40A Car Battery Charger: The 12V/40A and 24V/20A fast car battery chargers charge much faster than 10A car chargers. Multi-stage charging processes with quick and trickle charging protect your batteries
Intelligent Digital LED Display: The LED screen displays the values of ambient temperature, voltage, current and remaining battery capacity. You can easily check the battery status
Safety: This 40A car battery charger has multiple protection functions such as short circuit protection, overcurrent protection, cooling system and reverse polarity protection. The repair function activates batteries that have not been used for a long time, old batteries and batteries that cannot be charged
0V start: When the battery is exhausted due to long-term use, repair mode can be used to repair the battery, and charging can be started when the voltage is low
The car battery charger is suitable for 12V/24V 4Ah-400Ah lead acid batteries (AGM, GEL, SLA, VRLA). Suitable for most types of batteries, calcium batteries, gel AGM batteries, wet batteries and lead-acid batteries, 12V LiFePO4 batteries
Note: The battery charger will automatically turn off when fully charged. It starts charging when the battery is below a voltage level
The screen shows that 40A is the maximum current selected. Since this charger is a smart charger, it is normal for the charging current to fluctuate according to the different charging stages and battery power. This is to better maintain the battery life. For example, the current will gradually decrease when the first 15 minutes of charging is only 2.5A, or when the battery is more than 80% charged

Keep your vehicles and equipment powered with the LVYUAN Smart Battery Charger and Maintainer. This advanced 12V/24V unit delivers efficient 10A/20A charging, significantly reducing downtime for your car, truck, or motorcycle. Its intelligent multi-stage charging process quickly revives batteries while the precision trickle charge safely maintains them for long-term health. The clear digital LED display provides real-time data on voltage, current, and temperature for complete control. Engineered with comprehensive safety protections and a unique 0V start repair mode, it can even recover deeply discharged or aging batteries. As a versatile all-in-one solution, it's fully compatible with both traditional lead-acid (AGM, GEL, SLA) and modern 12V LiFePO4 lithium batteries. Review: Charges fast works good - Works good for me charges much faster than the other typical 20 amp ones. I have two 12-volt lithium batteries connected in parallel so this charges them up real fast and it works good Review: En tiempo y bien - Llego a tiempo y en perfecto estado, realice pruebas de carga y trabaja muy bien. Confiable. Gracias.

Specifications

ASIN	B0DMD2C942
Amperage	40 Amps
Brand	LVYUAN
Color	Black
Colour	Black
Current Rating	40 Amps
Customer Reviews	4.1 out of 5 stars 38 Reviews
Input Voltage	120 Volts
Item Dimensions D x W x H	17.5D x 20W x 11.4H centimeters
Item Weight	1.68 kg
Item weight	1.68 kg
Manufacturer	Guangzhou LVYUAN Technology Co., Ltd.
Mfr Part Number	40A-PRO
Model Number	40A-PRO black
Number of Items	1
Output Voltage	12 Volts (DC), 24 Volts (DC)
Output voltage	12 Volts (DC), 24 Volts (DC)
Product dimensions	17.5D x 20W x 11.4H centimeters
Specification Met	UL, CE, FCC, IEC
Specification met	UL, CE, FCC, IEC

Reviews

G**J

Charges fast works good

Works good for me charges much faster than the other typical 20 amp ones. I have two 12-volt lithium batteries connected in parallel so this charges them up real fast and it works good

5.02.2026

N**Z

En tiempo y bien

Llego a tiempo y en perfecto estado, realice pruebas de carga y trabaja muy bien. Confiable. Gracias.

2.07.2026

H**E

LVYUAN 12V/24V 10A/20A/40A Battery Charger with Trickle BC-400 PRO

Over charges battery, does not do as it promise, 😒 damage my batteries

12.05.2025

J**E

Works as advertised

Works great!

12.03.2026

A**Z

Bieno

Lo usé en una batería de 475 ah funcionó muy bien,la cargo

12.03.2026

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LVYUAN 12V/24V Car Battery Charger with Trickle Charger Automotive Smart Battery Charger, Smart Battery Maintainer, 10A/20A/40A for Car Truck Motorcycle LiFePO4 Lithium and Lead Acid Batteries

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Description

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Common Questions