Transform your battery maintenance experience with the innovative Battery Tender® Charge N Start 4120 ¿ the ultimate 2-in-1 power solution. Engineered in the USA and backed by 60 years of battery expertise, this versatile device combines advanced charging technology with reliable jump-starting power in one portable unit. With 1200 amps of instant jump-starting power, the Charge N Start 4120 easily handles engines up to 6.0L gas and 4.0L diesel. The integrated 12V/4 AMP smart charger utilizes exclusive ISM (Infinite Sequential Monitoring) technology to optimize battery health and extend lifespan. Advanced charging technology automatically switches between maintaining your vehicle's battery and the internal jump starter, ensuring both power sources are always charged and ready. No manual intervention needed ¿ the Charge N Start 4120 intelligently manages both batteries for complete peace of mind. Whether you're maintaining a single vehicle or managing an entire fleet, the Charge N Start 4120 delivers the performance, reliability, and safety features you expect from Battery Tender®. Don't let battery issues slow you down.

Product Features:

• 2-in-1 Solution: Combines a 4 AMP smart battery charger and 1200 AMP jump starter in one compact, portable unit ¿ two tools in one.
• 2-in-1 Solution: Combines a 4 AMP smart battery charger and 1200 AMP jump starter in one compact, portable unit ┐ two tools in one.
• Powerful Jump Starting: Delivers 1200 amps of instant starting power, capable of jump-starting gas engines up to 6.0L and diesel engines up to 4.0L.
• ISM Smart Charging: Exclusive Infinite Sequential Monitoring technology continuously monitors battery condition and delivers the correct charge process at all times.
• Automatic Dual-Battery Management: Intelligently switches between maintaining your vehicle battery and the internal jump starter battery ¿ no manual intervention needed.
• Automatic Dual-Battery Management: Intelligently switches between maintaining your vehicle battery and the internal jump starter battery ┐ no manual intervention needed.
• Advanced Microprocessor Control: Automatically detects battery charge level and adjusts the charging process for optimal performance and battery health.
• SafeGuard Circuit Protection: Spark-proof connections, reverse polarity protection, and temperature compensation prevent dangerous backfeeding and protect sensitive electronics.
• Charge N Store Technology: Proprietary Charge N Store¿ technology monitors and maintains optimal float voltage during long-term storage, keeping your battery ready for action.
• Charge N Store Technology: Proprietary Charge N Store┐ technology monitors and maintains optimal float voltage during long-term storage, keeping your battery ready for action.
• Charge Status Indicator: Built-in indicator keeps you informed of the internal battery level of the Charge N Start at all times.
• Engineered in the USA: Designed and built in the USA by Battery Tender«, backed by 60 years of battery care expertise.
• Engineered in the USA: Designed and built in the USA by Battery Tender®, backed by 60 years of battery care expertise.
• Versatile Vehicle Compatibility: Suitable for cars, trucks, motorcycles, ATVs, and more ¿ ideal for everyday drivers and fleet maintenance alike.
• Versatile Vehicle Compatibility: Suitable for cars, trucks, motorcycles, ATVs, and more ┐ ideal for everyday drivers and fleet maintenance alike.