CTEK CS FREE 4-in-1 Portable Battery Solution - Adaptive Booster, Charger, Maintainer & Power Bank

The CTEK CS FREE delivers unmatched vehicle battery versatility with its groundbreaking 4-in-1 functionality. This revolutionary device combines an Adaptive Booster that safely revives flat batteries in minutes, a professional-grade battery charger and maintainer for both lead-acid and lithium batteries, and a portable power bank for USB devices. Featuring advanced Swedish engineering, it eliminates the need for jump cables while providing complete freedom to charge and maintain vehicle batteries anywhere – even off-grid with optional solar or service battery accessories. Never be stranded with a dead battery again.

ADVANCED MULTI-FUNCTION TECHNOLOGY IN ONE PORTABLE DEVICE

• Adaptive Boost Technology - Safely revives flat batteries in minutes without risk to vehicle electronics
• Universal Battery Compatibility - Works with all 12V lead-acid and lithium (LiFePO4) batteries (10-130Ah)
• Off-Grid Charging Freedom - Charge anywhere using optional solar panel or service battery accessories
• Intelligent Countdown Display - Shows exactly when your battery has enough power to start
• Automatic Battery Detection - No mode selection required; automatically adapts to battery type
• Dual USB Power Outputs - USB-C (60W max) and USB-A (12W) ports for charging laptops, phones, and tablets
• High-Capacity Internal Battery - 66Wh lithium-ion battery powers multiple device charges or battery boosts
• Rugged Weatherproof Design - IP54-rated construction for reliable field performance

PROFESSIONAL-GRADE SPECIFICATIONS

THE PROFESSIONAL ADVANTAGE OVER TRADITIONAL SOLUTIONS

Unlike conventional jump starters, battery chargers, or power banks, the CS FREE delivers significant advantages:

• Safer Than Jump Cables - Adaptive Boost technology prevents damaging power surges to vehicle electronics
• More Versatile Than Standard Chargers - Works with any 12V battery type and can operate completely off-grid
• Superior to Basic Jump Starters - Properly conditions batteries rather than just forcing a start
• More Powerful Than Typical Power Banks - 66Wh capacity with high-output USB-C port for laptops and tablets
• Professional Diagnostic Capability - Countdown display shows precise battery readiness and charging time
• Comprehensive Battery Solution - Replaces multiple devices with one integrated professional tool

IDEAL FOR MULTIPLE APPLICATIONS

• Personal vehicles (cars, trucks, SUVs)
• Motorcycles and powersport vehicles
• Boats and marine equipment
• RVs and camping vehicles
• Lawn and garden equipment
• Emergency preparedness kits
• Off-grid applications
• Mobile mechanics and service professionals

FREQUENTLY ASKED QUESTIONS

Q: How does the Adaptive Boost differ from traditional jump starters?
A: Unlike traditional jump starters that force a high-current surge through your battery, the CS FREE's Adaptive Boost technology analyzes your battery's condition and delivers a precisely controlled charge that safely revives the battery without risking damage to sensitive vehicle electronics. This makes it safer for modern vehicles with sophisticated computer systems.

Q: How long does it take to charge the CS FREE's internal battery?
A: Using the included USB-C power adapter, the internal battery charges in approximately 2.5 hours. With optional accessories, charging times vary: approximately 1 hour with the 12V vehicle outlet adapter, 1-2 hours with service battery clamps, and 1.5-5 hours with the solar panel (depending on sunlight conditions).

Q: Can this charge both lead-acid and lithium batteries?
A: Yes, the CS FREE automatically detects and properly charges all 12V lead-acid batteries (WET, MF, Ca/Ca, AGM, EFB, GEL) and lithium (LiFePO4) batteries with capacities from 10-130Ah, making it exceptionally versatile for all vehicle types.

Q: How many times can I boost a dead battery on one charge?
A: The CS FREE can typically provide 3-5 battery boosts on a single charge, depending on the condition of the dead battery and environmental factors. For battery maintenance charging, it can deliver approximately 5-8 hours of continuous charging before requiring recharging.

Q: What accessories do I need for off-grid charging?
A: For complete off-grid capability, CTEK offers three optional accessories: the Solar Panel Charge Kit (for solar charging), the USB-C Charge Cable Clamps (for charging from another 12V battery), or the USB-C Charge Cable 12V Plug (for charging from a vehicle's 12V outlet). These accessories are sold separately.