GYSFLASH 4.12 12V battery charger 4A, IP65, smart 7-step

Power up every journey with smart charging technology

Ready to wave goodbye to dead batteries and constant replacements? The GYSFLASH 4.12 transforms battery care, offering a professional solution for anyone from automotive enthusiasts to daily commuters. With its intelligent microprocessor and fully automatic 7-step charging technology, you ensure your battery gets the optimal treatment every single time—whether you're maintaining a classic motorbike or charging a car after winter storage.
 

Advanced protection and intelligent charging—safety is standard

The GYSFLASH 4.12 doesn’t just charge—it actively protects. Thanks to a sophisticated electronic safety pack, your battery is secure against short circuits, reverse polarity, and even sparks at connection. The 7-step fully automatic charging curve ensures every phase—analysis, recovery (including SOS Recovery for deeply discharged batteries), test, desulfation, charging, absorption, and maintenance—is handled precisely. You get maximum battery performance and lifespan without risk of overcharge or operator error.

Charging that adapts to every battery and season

Seasons change, temperatures fluctuate—but your battery charging stays optimal. With a dedicated Winter/AGM mode, the GYSFLASH 4.12 automatically increases charge voltage for AGM or cold batteries, ensuring full performance in winter or after deep discharge. Maintenance mode allows your vehicles to stay connected for long periods—ideal for seasonal cars, motorcycles, or even boats stored in the off-season. The charger smartly enters standby when charging is complete, avoiding any risk to your battery.

Compact, robust and ready for real-world use

Don’t let the compact build fool you: the GYSFLASH 4.12 packs robustness into a lightweight profile that fits any garage, glovebox, or workshop. Its IP65 rating means it's genuinely dust-tight and protected from water jets—use it confidently outdoors or in tough environments. Intuitive status LEDs update you at every step, and accessories from clamps to terminal lugs connect effortlessly. Safety is further supported by double insulation and a smart auto-standby to protect both user and battery.

• Charges and maintains 12V lead-acid, AGM, GEL, MF, Start-Stop, and calcium batteries
• 7-step fully automated charging with intelligent microprocessor
• SOS Recovery mode for deeply discharged batteries
• Winter/AGM mode optimizes for extreme cold or special batteries
• IP65 waterproof and dustproof—safe for both indoor and outdoor use
• Advanced short circuit, overcharge, and reverse polarity protection
• Automatic standby and restart after power loss
• Includes both clamps and terminal lug connectors
• Visual indicators for charging phase and battery status
• Ultra-compact and lightweight for easy portability

Engineered by GYS—trusted technology for everyone

GYS, a renowned French manufacturer, builds on decades of battery management expertise. Whether you’re a hobbyist, a daily driver, or a professional, the GYSFLASH 4.12 is the smart, safe and future-proof choice. Get peace of mind with industry-leading protection, reliable year-round performance, and the flexibility to handle all your battery charging needs with a single device.