10 Best heavy duty battery charger (2025)

• Heavy Duty Battery Charger - This car battery charger is made with copper coil, metal and ABS casing, weighing 12.2 lb, making it durable and powerful. It is compatible with all types of lead-acid batteries, including AGM, GEL, Wet/Flooded, EFB, Calcium, MF, and deep-cycle batteries.
• Two Charging Rates- Fast charge or trickle charge modes. The automotive battery charger automatically detects 12V and 24V batteries, charges and maintains battery with its automatic charging program. Simply connect it and forget about it.
• Charge Dead Batteries - The repair mode can revive dead batteries (above 3v) in various vehicles such as cars, trucks, motorcycles, boats, marines, RVs, and lawn mowers... It is specifically designed to bring dead batteries back to life, getting your vehicles up and running again.
• Auto Off / Maintain - The battery charger offers two charging modes. The auto shut-off mode stops charging when the battery is fully charged, preventing overcharging. The maintain mode uses a pulse current to restore and extend the life of old, drained, stratified and sulfated batteries after they are fully charged.
• Winter Mode - Designed for all climates, the special winter mode provides a more complete charge to the battery in cold weather, ensuring a stronger engine start. The easy-to-read LCD digital display shows charging percentage, current, and voltage, providing precise and intuitive charging information.

• Powerful Engine Starter & Battery Charger – This manual battery charger delivers 250 amps for reliable engine starting and 50-amp boost mode to revive severely discharged 12V batteries.
• Manual Operation with Precision Control – Equipped with a 135-minute timer, this heavy duty battery charger allows users to control charge time for accurate and safe charging.
• Heavy-Duty, All-Weather Performance - This dual battery charger and jump starter's 8-gauge output cables remain flexible in cold weather, ensuring solid, color-coded connections for both top- and side-mount battery posts.
• Portable & Easy to Store – The retractable handle and compact wheels on these 250 amp battery chargers provide convenient mobility, while the 12-foot total reach (6-foot power cord + 6-foot cables) offers flexibility in use.
• Trust in Schumacher - As a trusted name in car accessories, we proudly back every battery charger, engine starter and tender we release. Our products are designed to meet the needs of both professional and consumer users.

• Convenient handle with grip and quality steel foot for long lasting use
• 90 minute timer with hold
• CSA listed for US and Canada
• Safe in any weather

• Heavy Duty Battery Charger - The car battery charger is made with copper coil, metal and ABS casing, weighing 12.2 lb, making it durable and powerful. It is compatible with all types of lead-acid batteries, including AGM, GEL, Wet/Flooded, EFB, Calcium, MF, and deep-cycle batteries.
• Two Charging Rates- Fast charge or trickle charge modes. The automotive battery charger automatically detects 12V and 24V batteries, charges and maintains the battery with its automatic charging program. Simply connect it and forget about it.
• Charge Dead Batteries - The BC-108 battery charger's repair mode can revive dead batteries (above 3v) in various vehicles such as cars, trucks, motorcycles, boats, marines, RVs, and lawn mowers... It is specifically designed to bring dead batteries back to life, getting your vehicles up and running again.
• Auto Off / Maintain - This 12v 24v battery charger offers two charging modes. The auto shut-off mode stops charging when the battery is fully charged, preventing overcharging. The maintain mode uses a pulse current to restore and extend the life of old, drained, stratified and sulfated batteries after they are fully charged.
• Winter Mode - Designed for all climates, the special winter mode provides a more complete charge to the battery in cold weather, ensuring a stronger engine start. The easy-to-read LCD digital display shows charging percentage, current, and voltage, providing precise and intuitive charging information.

• Powerful Engine Start and Charging - This fully automatic battery charger delivers 200A engine start, 40A boost, and 6/2A charge/maintain for extreme starting and efficient charging.
• Built-In Battery and Alternator Tester - Diagnose electrical issues with the integrated battery and alternator tester. The heavy duty battery charger is designed to provide real-time charge level insights, and use auto voltage detection to support both 6V and 12V batteries.
• Precise Battery Protection - These auto battery chargers use microprocessor-controlled multi-stage charging to automatically adjust amperage, optimizing performance and extending battery life. Float mode monitoring maintains an ideal charge level to prevent overcharging.
• Durable, Portable Design - Designed for rugged use, the wheeled battery charger has compact wheels, a retractable handle, and front-facing clamps for easy mobility and storage. Schu Eco Energy certified and DOE compliant, meeting the highest industry standards for efficiency.
• Trust in Schumacher - As a trusted name in car accessories, we proudly back every car battery charger, engine starter and tender we release. Our products are designed to meet the needs of both professional and consumer users.

This Schumacher Electric Wheeled Battery Charger and Engine Starter, SC1400, 4-in-1, Fully Automatic, 300 Cranking Amps, 60 Amp Boost Mode, 6 Volt, 12 Volt, for Car, Truck, SUV, and Marine Batteries is a top choice in . Customers appreciate its quality, performance, and value.

• 4-in-1 Device - Engine starter, battery charger, battery maintainer, and desulfator
• High-Powered Performance - The Schumacher SC1364 delivers a 150 cranking amps engine start with 20 amp boost, 6 amp charge, and 2 amp maintain modes; strong enough for SUV, truck, and other large batteries
• Wide Compatibility - Compatible 12 volt standard and AGM batteries
• Fast 20 Amp Boost Mode - With the 20 amp boost charging mode you can bring even deeply discharged batteries back to life
• Microprocessor Controlled - The microprocessor adjusts the charge as needed, allowing fast charging without negatively impacting battery capacity and longevity

• The highest performance fleet charger on the market
• Safe in any weather operation. 500 amp fully insulated flexi-spring clamps. Automatic timer
• Fan cooling mechanism prevents overheating, enhancing units life span significantly
• CSA listed.Rated up to 80 Amp continuous charge with 400
• Made in the USA

• 【Upgraded 20A Heavy Duty Battery Charger】Battery Charger is made with copper coil, metal and ABS casing, weighing 11.5 lb. Designed to charge, maintain and repair all 12-volt and 24-volt lead-acid automotive, （12V-20 Amp, 24V-10Amp）marine and deep-cycle batteries including AGM, GEL, EFB, SLA,Flooded(WET), Calcium in cars, truck, SUVs, ATV, motorcycle, snowmobile, lawn mower, boat, tractor, forklift, golf cart, etc. which is much faster than 10A or 6A automatic chargers. NOTE: LITHIUM BATTERY DISABLED.
• 【High power, faster charging】Battery Maintainer has Fast charge/trickle charge Mode.The battery chargers automobile 12 volt automatically detects 12V and 24V batteries.Choose fast mode for 30-400AH batteries. Choose trickle mode for 6-30AH batteries; AC input: 110V 50/60Hz, input power with load: max 300W, applicable battery's voltage: 12V/24V, output current: max 20A/10A.
• 【Auto shut-off - no waiting around】The auto shut-off mode stops charging when the battery is fully charged, preventing overcharging. The maintain mode uses a pulse current to restore and extend the life of old, drained, stratified and sulfated batteries after they are fully charged.
• 【Winter/Summer Mode】The battery trickle charger can avoid overcharging the battery in hot summer and charge the battery normally in cold winter. It is your battery guardian! It has multiple protection functions to ensure safe charging！
• 【High-Efficiency Pulse Repair Mode】Revive dead batteries! Built-in advanced battery REPAIR mode to help to recover old/idle batteries and extend battery life. If the battery cannot be charged, please use repair mode. The high-frequency and low-frequency pulse technology has good repair and activation effects. The repair mode can revive dead batteries (above 3v) in various vehicles.

• 2-in-1 Device: Combines a powerful battery charger and engine starter
• High-Powered Performance: 250 cranking amps starts large engines with ease
• Fast Charge - Two boost modes (50 amp and 25 amp) quickly revive deeply depleted batteries.
• Manual Control - Take full charge with adjustable settings for rate and time, giving you complete control over the charging process.
• Wide Compatibility: Works with 6V & 12V standard, AGM, gel, and deep-cycle batteries