What devices can this charger work with?

All 12V lead-acid batteries for cars, motorcycles, agricultural tricycles and solar energy storage systems.

Does the analog ammeter display real-time current?

Yes, it shows real-time charging current. The current will drop close to 0A when the battery is fully charged.

Is it normal for the charger to get warm during charging?

Slight heating is normal under high current with built-in cooling fan. Cut off power immediately if the fan stops or the unit gets extremely hot.

Can I customize this battery charger?

Yes, we support multiple customization services, including custom logo, packaging, plug types, output current and parameter adjustment. MOQ is required for customized orders, welcome to contact us for details.

High-Efficiency 12V 40A Smart Charger for All Devices

Name: High-Efficiency 12V 40A Smart Charger for All Devices
Brand: Guangzhou Jianrui Electronics Co., Ltd.
SKU: 2314051425

Guangdong, ChinaGuangzhou Jianrui Electronics Co., Ltd.

US$15.70

1-199 Pieces

US$14.60

200-499 Pieces

US$14.10

500-999 Pieces

US$13.50

1,000+ Pieces

Product specifications

Charging power

Sample price:US$16.00/piece.Request sample

Product profile

Customization

Available

Rated Power

12V-170W

Charging Current

12V/40A

Model NO.

MA-1240AS

Input Voltage

160~250V

Type

Lead-Acid Battery Charger

Charging Type

Electric Charger

Principle

Half-Bridge Charger

Display Mode

Analog Ammeter Display

Charging Mode

4-Stage Intelligent Charging

Built-in Protection

Reverse Connection, Overcharge, Overload, Short Ci

Heat Dissipation

Aluminum Alloy Casing ,Cooling Fan

Applicable Battery Type

Lead-Acid Battery

Accessories

Battery Alligator Clips, Power Cord

Custom Service

Support Logo, Packaging, Plug Customization

Warranty Period

12 Months Warranty

Transport Package

Box Packed

Specification

19.7*14.5*7.5cm

Trademark

Jianrui

Origin

Guangzhou, China

HS Code

8504403000

Production Capacity

10, 0000 Pieces Per Year

Key features

4-Stage Intelligent Charging: Automatically stops overcharging to extend battery life with no manual operation needed.

Universal Voltage Support: Wide AC input range of 150V-250V compatible with global mains power standards.

Comprehensive Safety Protections: Built-in safeguards against overcharge, overcurrent, overheating, short circuit, and reverse polarity.

Multi-Battery Compatibility: Supports AGM, Gel, Flooded, and Deep Cycle lead-acid batteries from 10Ah to 1000Ah.

High Efficiency & Fast Charging: Up to 92% conversion efficiency with high current output for rapid battery replenishment.

Customization Services: Support for custom logo, packaging, plug types, and parameter adjustments with MOQ.

Durable Metal Construction: Aluminum alloy casing with cooling fan ensures heat dissipation and anti-drop durability.

Real-Time Display: Analog ammeter displays real-time charging current which drops to near 0A when fully charged.

Company profile

High Repeat Buyers ChoiceFast DeliveryFlexible Customization100% Finished Products Inspection

Guangzhou Jianrui Electronics Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedNearest Port: Guangzhou Port, Shenzhen PortAverage Response Time: ≤0.09h CertifiedTerms of Payment: LC, T/T, D/P, etc. CertifiedInternational Commercial Terms(Incoterms): CIF, CFR, EXW, FOB

About Our Factory & Business Background

Address3rd Floor, No.15, Lane 14, Baishuikeng Central Street, Nancun Town, Panyu District, Guangzhou City, Guangdong Province

Plant Area660 square meters

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Minimum Order Quantity1 Piece

Supply Chain Partners15

Our Production Capability & Technical Expertise

Main ProductsToroidal Transformer, Inverter

Production Lines2

Production MachinesReflow Soldering Machine, SMT Machine, Super Mute Terminal Machine, Winding Machine, Semi-automatic Dip Welding Machine, Cutting Machine

Inspection Type for Finished Products100% inspection(Function inspection & Visual inspection)

Inspection Method for Finished ProductsFinished product checked by packing staff

Traceability of Raw MaterialsYes

Our Industry Experience & Global Business Record

Year of Establishment2014-06-13

Main MarketsNorth America, Southeast Asia

Repeat Buyers Choice80%~100%

Overseas Agent/BranchNo

Product Q&A

Q:What battery voltage is this charger for?

It is specially designed for 12V lead-acid batteries, compatible with car, motorcycle, tricycle, gel and maintenance-free lead-acid batteries. NOT suitable for lithium batteries or disposable dry batteries.

Q:What's the input voltage range?

Wide AC input 150V-250V, compatible with mains power in most countries.

Q:What is the charging current? How long to fully charge a battery?

Rated charging current 20A. A 45Ah battery takes about 2 hours, 60Ah battery about 1.5hours; charging time depends on remaining battery power.

Q:What is 3-stage smart charging? What benefits does it bring?

3-stage charging includes constant current fast charging, constant voltage equalizing charging and float maintenance charging. It automatically stops overcharging and extends battery service life greatly.

Q:Will it stop charging automatically when full? Can I charge overnight?

It will switch to low-voltage float mode automatically once fully charged. Safe for overnight charging without battery damage.