Sealed Maintenance Free N40 Car Battery 12V 40ah Automotive Battery Car Starting Mf Battery N40

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Product Description

Technical Specifications

Model NO.
N40-MF
Charging Voltage
1.45V~1.5V
Working Voltage
1.5V~1.1V
Charging Type
Constant Voltage
Wet Shelf Life
5~8Year
Discharging Type
Constant Resistance
Electrolyte
Acid Battery
Certification
ISO9001, RoHS, CE
Brand
OEM Available
Application
Car Starting/Solar/Street Light
Weight
12.0-13.0kgs
Specification
L240*W130*H200*TH220mm

Sealed Maintenance Free N40 Car Battery

N40 Car Battery
MF batteries are sealed maintenance-free Calcium-Calcium batteries mainly used for starting vehicles and marines. The batteries are more popular than dry-charged batteries as they are much more convenient. These MF batteries feature special technology, including silver-infused battery plates for enhanced performance. The performance-oriented venting system provides superior corrosion protection while the high-strength polypropylene casing endures knocks, impact, and vibration. Advanced PE enveloped separators eliminate internal short circuits and boost Cold Cranking Amperage (CCA) levels by up to 10%.

🚗Typical Applications

  • Japanese Standard Vehicles
  • Passenger Cars & Vans
  • Buses & Engines
  • Trucks & Heavy Duty Vehicles
  • Lighting Systems
  • Marine Starting
KEY PERFORMANCE FEATURES
🛡️ Maintenance-Free
Sealed operation requiring no water top-ups.
⚡ High Conductivity
Computer-designed plate grid for optimized current flow.
🔄 Deep Recovery
Exceptional recovery from deep discharge cycles.
📉 Low Self-Discharge
Extended shelf life and long service reliability.

Internal Structure & Technology

Battery Structure

1. Radiation Gridding Plates: Thick Pb-Ca-Sn alloy plates ensure minimum self-discharge and reduce sulfation.

2. PE Separator: Super-thin glass fiber avoids short-circuits and reduces electric resistance.

3. Durable Poles: Mechanical operation ensures no leakage and high durability.

4. Central Busbar: Connected via COS machine for high conductivity and vibration resistance.

5. Magic-Eye: Integrated indicator for instant battery state monitoring.

6. PP Container: Anti-explosion and non-leakage reinforced polypropylene structure.

Manufacturing & Packaging

Packing Photo
Factory View 1
Factory View 2
Production Line

Frequently Asked Questions

Does this N40 battery require adding water?
No, this is a completely Sealed Maintenance Free (SMF) battery. The Calcium-Calcium technology minimizes water loss, so no refilling is required throughout its service life.
What is the expected lifespan of the N40-MF?
Under standard operating conditions, the wet shelf life is between 5 to 8 years, depending on usage frequency and maintenance of the charging system.
Is it suitable for vehicles with high vibration?
Yes, the battery uses a high-strength polypropylene (PP) casing and a central busbar system specifically designed to endure knocks and heavy vibrations common in commercial vehicles.
How can I tell if the battery is charged?
The battery is equipped with a "Magic-Eye" indicator. This built-in hydrometer allows you to check the state of charge and electrolyte level at a glance.
What does the PE envelope separator do?
The PE envelope separator prevents internal short circuits between the positive and negative plates while reducing electric resistance, which boosts the Cold Cranking Amperage (CCA) for easier engine starts.
Can this battery be used for solar power storage?
While primarily designed for car starting, its robust plate design also makes it suitable for light solar applications and street lighting systems.

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