CTEK PRO25S Professional Battery Charger - 12V 25A

Professional-grade battery charging for workshops, dealerships, and serious enthusiasts. The CTEK PRO25S delivers 25A of charging power with advanced 8-step automatic charging, supply mode for diagnostic work, and compatibility with all 12V battery types including lithium (LiFePO4). Built for demanding professional environments with IP44 protection and rugged construction.

Key Features:

• Professional 25A charging current for fast, efficient charging
• 8-step fully automatic charging for optimal battery health
• Works with ALL 12V battery types - lead-acid AND lithium (LiFePO4)
• Supply mode provides stable 13.6V power for diagnostic work
• Charges batteries 14-500 Ah (maintenance up to 500 Ah)
• Automatic maintenance mode prevents overcharging
• Recondition mode restores deeply discharged batteries
• Snowflake mode for cold weather charging
• IP44 rated - splash and dust resistant
• Spark-proof and reverse polarity protected
• Wall-mountable design for workshop installation
• 5-year warranty

Performance Benefits:

• Professional Power: 25A charging current for fast charging of large batteries
• Universal Compatibility: Works with lead-acid AND lithium batteries
• Supply Mode: Provides stable power for diagnostic equipment and testing
• Workshop-Ready: IP44 protection, wall-mountable, built for professional use
• Battery Recovery: Recondition mode can restore deeply discharged batteries
• Cold Weather Ready: Snowflake mode optimizes charging in freezing temperatures

Specifications:

• Brand: CTEK
• Part Number: 40-328 (PRO25S)
• Model: PRO25S
• Input: 220-240V AC (50-60Hz)
• Output: 12V DC
• Charging Current: 25A (max)
• Battery Capacity: 14-500 Ah (charging and maintenance)
• Battery Types: All 12V lead-acid (AGM, Gel, Flooded, Calcium, EFB) AND lithium (LiFePO4)
• Charging Steps: 8-step automatic charging
• Special Modes: Supply mode (13.6V), Recondition, Snowflake (cold weather)
• Protection: IP44 (splash and dust resistant)
• Safety: Spark-proof, reverse polarity protection, overcharge protection
• Mounting: Wall-mountable
• Warranty: 5 years
• Weight: 4.7 lbs
• Barcode: 7340103403289

Fitment Information:

• Universal Application: Works with any 12V battery
• Battery Types: Lead-acid (AGM, Gel, Flooded, Calcium, EFB) AND Lithium (LiFePO4)
• Vehicle Types: Cars, trucks, motorcycles, boats, RVs, commercial vehicles, heavy equipment
• Battery Capacity: 14-500 Ah (charging and maintenance)
• Professional Use: Workshops, dealerships, fleet maintenance, marine facilities

What's Included:

• CTEK PRO25S charger unit
• AC power cord (6.5 ft)
• DC output cable with clamps (6.5 ft)
• Wall mounting bracket
• User manual

How to Use:

• Mount on wall or place on workbench
• Connect charger to battery (red to positive, black to negative)
• Plug charger into AC outlet
• Select mode (Normal, Recondition, Snowflake, or Supply)
• Charger automatically detects battery type and begins 8-step charging
• LED indicators show charging progress and mode status
• Charger automatically switches to maintenance mode when battery is full
• Can be left connected indefinitely for battery maintenance

8-Step Automatic Charging:

The CTEK PRO25S uses an advanced 8-step charging process that optimizes battery health and longevity:

1. Desulphation: Removes sulphation from battery plates for improved performance
2. Soft Start: Tests battery condition before charging begins
3. Bulk Charge: Charges battery to approximately 80% capacity using maximum current (25A)
4. Absorption: Continues charging at declining current until battery reaches 100%
5. Analysis: Tests battery's ability to hold charge
6. Recondition: Restores battery capacity (when Recondition mode selected)
7. Float Charge: Maintains battery at 100% without overcharging
8. Pulse Maintenance: Keeps battery fresh during long-term storage

Supply Mode - Professional Diagnostic Power:

The PRO25S features a unique Supply mode that provides stable 13.6V power output without charging. This is invaluable for professional diagnostic work, allowing you to power vehicle systems for testing and diagnostics without draining the battery. Supply mode can also be used to power 12V equipment in the workshop.

Lithium (LiFePO4) Compatibility:

Unlike most chargers, the CTEK PRO25S is fully compatible with lithium iron phosphate (LiFePO4) batteries in addition to all lead-acid types. The charger automatically detects battery chemistry and adjusts its charging profile accordingly. This makes it the ultimate universal charger for modern workshops dealing with both traditional and lithium batteries.

Recondition Mode:

The Recondition mode uses a controlled high-voltage charge to break down sulphate crystals that build up on battery plates over time. This can restore capacity to deeply discharged or neglected batteries, extending their service life. Essential for workshop environments where battery recovery is needed.

Snowflake Mode (Cold Weather):

The Snowflake mode optimizes charging for cold weather conditions (below 32°F/0°C). Cold temperatures reduce battery capacity and charging efficiency, so the Snowflake mode adjusts the charging algorithm to ensure optimal charging even in freezing conditions. Perfect for winter workshops or cold climate facilities.

Professional Workshop Features:

• 25A Fast Charging: Quickly charges large batteries for efficient workshop throughput
• Wall-Mountable: Saves bench space and keeps charger accessible
• IP44 Protection: Splash and dust resistant for workshop environments
• Long Cables: 6.5 ft cables provide flexibility for various vehicle positions
• Supply Mode: Diagnostic power without battery charging
• Rugged Construction: Built to withstand daily professional use

Safety Features:

• Spark-Proof: Safe to connect even if battery is installed in vehicle
• Reverse Polarity Protection: Prevents damage if you accidentally connect cables backwards
• Overcharge Protection: Automatically prevents overcharging
• Short Circuit Protection: Protects charger and battery from damage
• IP44 Rating: Splash and dust resistant for workshop use

Why CTEK?

CTEK is the world leader in battery charging technology, with over 20 years of experience developing advanced charging solutions. Their professional chargers are used by dealerships, workshops, and fleet maintenance facilities worldwide. CTEK's patented charging algorithms ensure optimal battery health, maximum lifespan, and reliable performance. Every CTEK charger is backed by a 5-year warranty.

Professional vs. Consumer Chargers:

The PRO25S is designed for professional use with features that consumer chargers lack:

• 25A charging current vs. 5A on consumer models
• Supply mode for diagnostic work
• Lithium (LiFePO4) compatibility
• IP44 workshop-grade protection
• Wall-mountable design
• Handles batteries up to 500 Ah

Perfect For: Professional workshops, dealerships, fleet maintenance facilities, marine service centers, heavy equipment maintenance, or serious enthusiasts with multiple large vehicles.

Pro Tip: Mount the PRO25S on the wall near your primary work area for easy access. The long cables allow you to reach most vehicles without moving the charger.

Industry Standard: The CTEK PRO25S is the professional's choice for fast, reliable battery charging and diagnostic power supply.

Professional-grade battery charging with CTEK's PRO25S - 25A power, lithium compatibility, supply mode, and workshop-ready construction.