A High-Efficiency, Intelligent Charging Solution for Your Batteries

The COTEK CX1235 is a 35A, 3-stage advanced battery charger designed for optimal battery maintenance and longevity. It is ideal for automotive, marine, RV, solar, and industrial applications, providing a smart charging process to extend the life of your batteries.

Built with universal AC input (90–264VAC) and active Power Factor Correction (PFC), this charger adapts to various global power standards, ensuring consistent performance. Its intelligent 3-stage charging process (Bulk, Absorption, and Float) prevents overcharging while maintaining peak battery condition. Additionally, the Engine Start Battery (ESB) output function keeps a secondary starter battery charged, making it an excellent solution for vehicles and equipment requiring reliable backup power.

This charger is built for high efficiency, safety, and reliability. Featuring up to 87% efficiency, it reduces energy waste and heat generation, making it more eco-friendly and cost-effective. The rugged design includes multiple protection features such as short-circuit, over-voltage, and temperature protection, ensuring safe operation in demanding environments.

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Key Features

• Universal AC Input with Active PFC

  Works with 90–264VAC input, making it suitable for global applications and ensuring energy efficiency.

• 3-Stage Smart Charging Process

  Automatically adjusts charging to Bulk, Absorption, and Float stages, preventing overcharging and prolonging battery life.

• Dedicated Engine Start Battery Output

  A 13.8V/2A auxiliary output keeps your starter battery charged, ensuring readiness for vehicles and emergency power needs.

• High Efficiency and Low Power Consumption

  With an efficiency rating of up to 87%, this charger minimizes power loss and reduces energy costs.

• Multiple Safety Protections

  Integrated short-circuit, over-voltage, over-temperature, and brown-out protections safeguard both the charger and your batteries.

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Why Choose the COTEK CX1235?

Advanced 3-Stage Charging for Maximum Battery Life

Unlike traditional chargers that can overcharge or undercharge batteries, the COTEK CX1235’s 3-stage charging system ensures proper charge cycles.

1. Bulk Charge Mode – Delivers a constant high current (35A) to rapidly charge the battery up to 80% capacity.
2. Absorption Charge Mode – Slowly tops off the battery with constant voltage, preventing overcharging while bringing it to 100% charge.
3. Float Mode – Maintains a steady low voltage charge, keeping the battery at full capacity without overcharging.

This process ensures longer battery life and improved reliability, making it an excellent choice for deep-cycle and standby power applications.

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Built for Versatility and Performance

The COTEK CX1235 is compatible with multiple battery types, including:

• Lead Acid (Flooded, AGM, and Gel)
• Lithium-Ion (LiFePO4, Li-Ion)

This flexibility makes it ideal for marine applications, RVs, off-grid solar systems, industrial equipment, and emergency backup power.

Additionally, its universal AC input with active PFC allows it to function with any standard power source worldwide, from 90V to 264V AC. This makes it ideal for use in North America, Europe, and other regions without requiring a voltage converter.

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Engine Start Battery Output for Vehicles and Backup Power

A unique feature of the CX1235 is its dedicated Engine Start Battery (ESB) output. This 13.8V/2A auxiliary output ensures that your starter battery remains fully charged, making it perfect for:

• RVs and motorhomes
• Boats and marine applications
• Emergency generators
• Off-grid solar and backup power systems

With this feature, you never have to worry about a dead starter battery when you need your vehicle or generator the most.

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Reliable and Safe Operation in Any Environment

The COTEK CX1235 is engineered for safety and durability, with built-in protections against:

• Short circuits
• Over-voltage
• Over-temperature
• Brown-out conditions

Its rugged and compact design ensures reliable operation even in harsh environments, making it an excellent choice for professional and recreational users alike.

The charger also supports an optional remote control (CR-1) for easy monitoring and operation.

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Technical Specifications

Specification	Details
Model Number	CX1235
Battery Compatibility	Lead Acid (Flooded, AGM, Gel), Lithium-Ion (LiFePO4, Li-Ion)
Output Voltage	12V
Boost Charge Voltage	14.4V / 14.7V (selectable)
Float Charge Voltage	13.8V / 13.5V (selectable)
Main Charging Current	35A
Main Output Quantity	2
Engine Start Battery Output	13.8V / 2A
Input Voltage Range	90–264VAC
Efficiency	Up to 87%
Operating Temperature	-20 to 50°C
Storage Temperature	-40 to 85°C
Dimensions (W x H x D)	183 x 72 x 263 mm
Weight	1.9 kg
Certifications	CE approved
Protection Features	Short Circuit, Over Voltage, Over Temperature, Brown-out Protection
Optional Accessories	Remote Controller (CR-1), Battery Temperature Sensor

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