16.8V 1.5A 25.2W 4S Lithium Battery Charger with 5.5x2.5mm Center-Pin DC Connector

Product Overview

The 16.8V 1.5A 25.2W 4S Lithium Battery Charger is an AC/DC desktop charger developed for rechargeable 4S lithium-ion battery packs with a nominal battery voltage of 14.8V and a full-charge voltage of 16.8V.

The charger provides a regulated 16.8V DC output at 1.5A and is designed for applications that require a compact external charging solution for compatible lithium battery systems. Its 5.5x2.5mm center-pin DC connector provides a commonly used connection format for equipment requiring this connector specification.

The charger supports universal 100–240VAC input, making it suitable for international product development and OEM projects. For manufacturers developing portable equipment, the final connector, cable configuration and electrical interface should be matched to the battery pack and equipment requirements before production.

Guangdong QINX Technology Co., Ltd. manufactures AC/DC battery chargers and power products for global OEM and ODM customers. The company supports standard products as well as application-specific development and customization.

For customers comparing different charging configurations, the 16.8V lithium-ion battery charger range provides multiple output-current and power options within the same voltage platform.

Key Features

• 16.8V regulated DC output

• 1.5A / 1500mA output current

• 25.2W rated output power

• Designed for 4S lithium-ion battery packs

• 5.5x2.5mm center-pin DC connector

• Universal 100–240VAC input

• CC/CV charging control

• Desktop AC/DC charger format

• OVP, OCP, SCP and OTP protection

• DOE Level VI efficiency design

• OEM/ODM customization support

• Cable, connector, labeling and packaging customization available

Technical Specifications

Energy Efficiency

The charger is designed around an energy-efficient AC/DC conversion architecture and supports DOE Level VI efficiency requirements. This helps reduce unnecessary energy consumption during normal operation and supports lower standby power considerations for equipment manufacturers.

For OEM projects, efficiency and standby-power requirements can be reviewed together with the customer's target-market requirements during product development.

Applications

This 16.8V 1.5A charger is intended for compatible 4S lithium-ion battery systems and portable electronic equipment. The specified application includes portable X-ray machines, where the charger may be considered as part of a battery charging system subject to the equipment manufacturer's electrical, safety and regulatory requirements.

Because portable X-ray equipment is a specialized application, final suitability should be confirmed against the complete system design, battery pack, BMS, charging interface and applicable equipment-level compliance requirements. This product page does not represent medical-device certification.

For broader application planning, the AC/DC power supply application solutions cover industrial equipment, portable electronic products and other application environments.

Connector Options

The standard configuration for this model is a 5.5x2.5mm center-pin DC connector.

The connector and cable assembly should be matched to the customer's battery pack and equipment interface. For OEM projects, Guangdong QINX can review connector requirements and support customized DC connector configurations where required.

Connector-related customization can include connector type, cable length and cable assembly configuration, subject to project requirements and technical review.

Protection Features

The charger includes the following standard protection functions:

• OVP (Over Voltage Protection)

• OCP (Over Current Protection)

• SCP (Short Circuit Protection)

• OTP (Over Temperature Protection)

These protection functions are intended to support safer operation of the external charger under abnormal electrical or thermal conditions.

OEM & Custom Solutions

Guangdong QINX supports OEM and ODM battery charger development for customers requiring specifications beyond the standard configuration.

The custom battery charger solutions can be developed according to project-specific electrical, mechanical and application requirements.

Product Development Support

• Specification review

• Prototype support

• Output voltage and current review

• Connector selection

• Prototype testing

• System verification

Sample Validation

Before mass production, customers can evaluate prototype samples against their battery pack and equipment interface. Testing can verify charging compatibility, connector fit, cable configuration and overall system operation.

Engineering Support

Guangdong QINX can support:

• Electrical specification review

• Output adjustment

• DC connector selection

• Cable configuration

• Product optimization

Customization options may include output voltage, output current, cable length, DC connector, labeling and packaging, subject to technical feasibility.

Manufacturing Capability

Requirement Analysis

For OEM projects, the manufacturing process begins with a review of:

• Input requirements

• Output specifications

• Power requirements

• Connector requirements

• Cable configuration

• Application environment

For specialized equipment such as portable X-ray systems, the customer should provide the relevant battery and system interface requirements so charger compatibility can be evaluated accurately.

Prototype Development

Prototype samples can be produced for:

• Initial evaluation

• Battery compatibility testing

• Connector verification

• System verification

Mass Production

After specification confirmation and sample approval, Guangdong QINX can support mass production through:

• Defined manufacturing processes

• Quality control procedures

• Production testing

• Quality inspection

• Shipment preparation

Certification Information

Depending on product specifications, target markets, and customer requirements, Guangdong QINX products can be designed to meet applicable certifications and compliance requirements, such as UL, cUL, SAA, PSE, UKCA, CE, RoHS, FCC, DOE Level VI, and CB.

Certification requirements for specialized equipment applications should be reviewed according to the complete end product and target market. The certifications listed above should not be interpreted as medical-device certification for portable X-ray equipment.

FAQ

Is this charger suitable for a 4S lithium-ion battery?

It is designed for 4S lithium-ion battery systems with a nominal voltage of 14.8V and a full-charge voltage of 16.8V. The battery pack and BMS specifications should be confirmed before use.

What is the output current?

The standard output is 16.8V DC at 1.5A (1500mA), providing 25.2W of output power.

What DC connector does this model use?

The specified configuration uses a 5.5x2.5mm center-pin DC connector. Customized connector configurations can be reviewed for OEM projects.

Can this charger be used with portable X-ray equipment?

The specified application is portable X-ray equipment, but final system suitability must be evaluated by the equipment manufacturer based on the battery pack, BMS, charging interface and applicable equipment-level compliance requirements.

Can Guangdong QINX customize the charger?

Yes. Guangdong QINX supports OEM/ODM development and can review requirements for output specifications, DC connectors, cable length, labeling and packaging.

Product Summary

The 16.8V 1.5A 25.2W 4S Lithium Battery Charger is a compact AC/DC desktop charging solution for compatible 4S lithium-ion battery systems. It combines universal 100–240VAC input, 16.8V/1.5A regulated output, CC/CV charging and a 5.5x2.5mm center-pin DC connector in a compact 101x48x32mm or 97x48x32mm housing configuration.

For OEM customers, Guangdong QINX provides specification review, prototype development, connector and cable customization, testing support and mass-production capability.

Request a Quote

If you are sourcing a 16.8V 1.5A charger for a 4S lithium-ion battery system, please contact Guangdong QINX with your battery specifications, connector requirements, cable length and target market.

For application-specific projects, providing the battery pack or complete electrical interface information can help the engineering team evaluate charger compatibility more accurately.