Frequently Asked
Questions

Oursun batteries are engineered to comply with all three major global fitment standards, ensuring compatibility with virtually any vehicle market:

• DIN (EN) -- European standard, widely used in Germany, France, Eastern Europe, and export markets requiring EN 50342 compliance.
• JIS -- Japanese Industrial Standard, covering Japanese OEM platforms and Asian aftermarket fitment (Toyota, Honda, Nissan, etc.).
• BCI -- Battery Council International, the North American standard used in the US, Canada, and Latin American markets.

Our sales team can provide a full cross-reference guide mapping OEM part numbers to our catalog SKUs. Please contact us with your vehicle make, model, and year for a precise fitment match.

To ensure accurate fitment and performance matching, please provide or reference the following parameters:

Yes. We maintain a comprehensive cross-reference database covering major OEM part numbers and aftermarket catalog codes. Our technical sales team can match your existing SKU list to our product catalog, including DIN, JIS, and BCI group numbers. Please share your application list or OEM numbers via our RFQ form and we will return a full fitment proposal within 24-48 business hours.

Both technologies are designed for start-stop systems, but they differ significantly in performance and application:

Recommendation: Always replace with the same or higher technology tier as specified by the vehicle manufacturer. Downgrading from AGM to EFB or MF may cause BMS (Battery Management System) faults on modern vehicles.

Our Parking A/C Battery Series is purpose-built for commercial trucks, heavy-duty vehicles, and long-haul transport applications where the engine is off but electrical systems -- primarily parking air conditioning units -- remain in continuous operation.

Unlike standard SLI batteries optimized for brief high-current cranking, the Parking A/C series is engineered for deep-cycle sustained discharge, offering:

• Enhanced deep-discharge recovery and longer service life under cyclic loads
• Robust construction for vibration and temperature extremes common in truck environments
• High reserve capacity to power cabin appliances during extended rest periods

Typical applications: long-haul trucks, intercity buses, construction equipment, and refrigerated transport vehicles.

Our Maintenance-Free (MF) Series is the ideal choice for conventional ICE vehicles without start-stop systems, particularly in the aftermarket replacement segment. Choose MF when:

• The vehicle does not feature a start-stop or regenerative braking system
• Cost-efficiency is the primary driver (budget aftermarket, emerging markets)
• The vehicle has standard electrical load without advanced ADAS or infotainment systems
• High-volume distribution requiring a broad SKU range at competitive price points

MOQ varies by product type and order configuration. General guidelines:

We support mixed-SKU loading within a single container to help distributors test multiple product lines. Please discuss your specific requirements with our sales team.

Lead times for custom OEM/ODM orders (new molds, unique specifications) may extend by 15-30 additional days. Our production capacity of 50,000 units/day ensures we can fulfill large volume orders reliably and on schedule.

Yes. With a 350,000 m² production base and a daily output of approximately 50,000 units, Oursun is equipped to handle high-volume and recurring orders with consistent delivery performance. For strategic buyers, we offer:

• Production scheduling confirmation with milestone updates
• Pre-production stock reservation for long-term supply agreements
• Dedicated account manager for order tracking and logistics coordination

We offer extensive customization to support private-label brands, regional distributors, and vehicle manufacturers. Customizable elements include:

Yes. Oursun has extensive experience supporting private-label and white-label programs for aftermarket distributors, automotive parts chains, and regional brand owners across Europe, Southeast Asia, the Middle East, Africa, and South America. We handle full brand identity application -- from label artwork approval through to finished goods delivery -- while maintaining strict NDA confidentiality for all partner brands.

Yes. Our in-house R&D Institute -- comprising a dedicated R&D Center, Testing Center, Industrial Design Center, and Technology Center -- supports full new product development. We collaborate with leading universities including Fudan University, East China Jiaotong University, and Xiamen University to drive material and structural innovation.

ODM development capabilities include: new case mold design, electrode plate formulation optimization, unique capacity/CCA combinations, and application-specific reliability validation (cold start, vibration, thermal cycling, etc.). Please submit your technical requirements via RFQ for a feasibility assessment.

Oursun maintains a comprehensive multi-standard certification portfolio, supporting OEM supply chain audits and global market access requirements:

Our quality control system covers every stage of the manufacturing process:

1. 01

   IQC -- Incoming Quality Control

   All raw materials (lead, alloys, separators, electrolyte) inspected against specification before production release.

2. 02

   IPQC -- In-Process Quality Control

   Critical process parameters monitored at plate manufacturing, assembly, filling, and formation stages.

3. 03

   Formation & Capacity Grading

   Every battery undergoes charge/discharge formation and capacity verification. CCA, capacity, and internal resistance tested per unit.

4. 04

   OQC -- Outgoing Quality Control

   Final inspection including appearance, labeling, sealing, and performance sampling before shipment release.

5. 05

   Batch Traceability

   Each battery carries a production date code and batch record, enabling full lot traceability for OEM and audit requirements.

Our standard outgoing test protocol includes the following evaluations:

Test reports can be provided upon request. For OEM customers, customized test protocols aligned to your internal standards can be arranged.

Yes. Wet (filled/activated) lead-acid batteries are classified as dangerous goods under international transport regulations. The standard UN classification is:

Oursun ensures all export shipments comply with IMDG (sea freight), IATA (air freight), and ADR (road) regulations. We provide proper hazmat labeling, packing declarations, and supporting documentation as required by the destination port and carrier.

We can provide a full set of export and compliance documentation, including:

Oursun currently exports to 30+ countries across six major regions:

We also hold the distinction of being recognized as a Jiangxi Province Export Brand Enterprise (2023). Our logistics team is experienced in navigating destination-specific import requirements, customs tariff codes, and port clearance documentation.

Our standard warranty coverage is as follows:

Warranty terms are subject to proper installation, correct application matching, and normal operating conditions. Extended warranty arrangements can be discussed for strategic distribution partners.

We take quality feedback seriously and operate a structured complaint resolution process:

1. 01. Complaint Submission -- Submit a written claim with batch number, photos, failure description, and quantity affected to your account manager or our after-sales email.
2. 02. Initial Response -- Our quality team acknowledges receipt within 48 hours and initiates batch traceability review.
3. 03. Root Cause Analysis -- If required, defective samples are returned for laboratory analysis. A formal root cause report is issued within 10-15 business days.
4. 04. Resolution -- Confirmed manufacturing defects are resolved via replacement, credit note, or refund per mutual agreement. Corrective and preventive actions (CAPA) are documented and shared.

Yes. Our technical sales team provides comprehensive pre-sale and post-sale support, including:

• Battery selection guidance based on vehicle application and operating environment
• OEM part number cross-reference and fitment verification
• Technical datasheets, test reports, and certification copies on request
• Installation and storage guidelines for distributors and end-users
• On-site factory visit and audit support for qualified buyers