For industrial buyers sourcing lithium batteries or lead-acid batteries from China, the sample request and evaluation process is a critical step that can make or break a long-term partnership. Whether you need E-bike lithium batteries, E-scooter lithium batteries, E-tricycle lithium batteries, solar energy storage lithium batteries, or golf cart lithium batteries, a well-executed sample trial helps you verify product quality, supplier reliability, and overall fit. This guide walks you through the entire sample journey — from request to bulk conversion — using Jiangxi Jinhaiyou New Energy Resources Technology Co., Ltd. (HAIYOU) as a practical example of a trusted Chinese manufacturer.
1. The 4-Step Sample Request Process
Step 1: Submit Your Requirements
Clearly communicate your application needs to the supplier. For example, specify the battery type (lithium battery vs. traction lead-acid battery), voltage (e.g., 48V, 60V, 72V), capacity (Ah), cell chemistry (NCM, LFP, LMO), and target application (E-motorcycle, household solar storage, agriculture sprayer). For HAIYOU, you can send an inquiry via their website https://www.jxhylkj.com/ or contact sales at nancy.shi@jxhylkj.com. Include quantity desired and any special certifications required (e.g., CE, UN38.3).
Step 2: Confirm Sample Parameters
Once the supplier receives your request, they will propose a sample model that matches your specs. For instance, HAIYOU may offer a 48V30Ah LFP battery for E-bikes or a 5.12KWh solar LFP battery for home storage. You should review the datasheet — nominal voltage, max discharge current, cycle life, operating temperature range, dimensions, and weight. Ask for CAD drawings if needed. HAIYOU's engineering team can customize connectors and BMS parameters to align with your system.
Step 3: Pay Sample Fee & Shipping
Most Chinese suppliers will charge a sample fee (often $100–$500 depending on battery size) plus shipping. Some manufacturers, including HAIYOU, offer sample fee deduction from the first bulk order. Payment methods usually include T/T, PayPal, or Alibaba Trade Assurance. Always confirm the delivery lead time — typically 5–10 working days for in-stock samples. HAIYOU operates two factories (one for lead-acid, one for lithium) and maintains a ready stock of popular models like 60V80Ah LFP and 72V100Ah LFP for fast dispatch.
Step 4: Receive and Inspect the Sample
Upon arrival, perform an initial visual check (see next section). Record the packaging condition and take photos for documentation. If the sample arrives damaged, report it immediately. HAIYOU ensures robust packaging with foam inserts to protect lithium battery cells during transit.
2. Three-Dimensional Sample Verification Standards
2.1 Visual & Physical Inspection
Check the battery casing for cracks, burrs, or uneven surfaces. Ensure terminal connections are clean and secure. Verify that the label includes the correct model number, voltage, capacity, date code, and certification marks (e.g., CE, ROHS). For HAIYOU batteries, each unit carries a unique serial number for traceability. Also inspect the BMS wiring and connectors — a well-made battery will have neatly soldered wires and heat-shrink tubing.
2.2 Technical Parameter Verification
Use a multimeter to measure open-circuit voltage (should match rating) and internal resistance (low is better for high discharge). Weigh the battery to confirm the specified mass. Measure dimensions with a caliper. Cross-check against the datasheet. HAIYOU provides detailed spec sheets for all products, including their 12V200Ah energy storage LFP battery and 72V180Ah LFP battery for electric tricycles.
2.3 Performance Testing
If possible, conduct a controlled charge/discharge cycle using a programmable load. Record the actual capacity — it should be at least 95% of the rated capacity. Test the BMS functions: overcharge protection, over-discharge cutoff, and short-circuit protection. For solar energy storage lithium batteries, simulate a typical charge/discharge profile. HAIYOU's batteries are factory-tested and come with certified test reports. They hold multiple patents for safety features (e.g., "A protective device for lithium battery transport" – patent number ZL202223133275.1).
3. Common Sample Policies from Chinese Battery Suppliers
| Policy Type | Description | Example (HAIYOU) |
|---|---|---|
| Free Sample | Supplier covers product cost; buyer pays shipping. Usually limited to 1–2 units for standard models. | HAIYOU offers free samples for bulk potential buyers; only freight charges apply. |
| Paid Sample | Buyer pays both sample cost and shipping. Sample fee may be refunded or deducted from first order. | HAIYOU charges sample fee for custom designs; 100% deductible on first 500+ unit order. |
| Sample Fee Deduction | Sample cost is subtracted from the bulk order invoice when order quantity exceeds a threshold. | Order over $5,000 → sample fee fully refunded via deduction. |
| Lead Time | Typically 3–10 working days for standard samples; 15–25 days for custom. | HAIYOU ships stock samples within 5 working days; custom orders in 20 days. |
4. Transitioning from Sample to Bulk Order: A Strategic Approach
Once you have verified the sample, follow these tips to smoothly move to mass production:
- Insist on sample-production consistency: HAIYOU guarantees that bulk production uses the same raw materials, BMS, and assembly processes as the approved sample. Their ISO9001:2015 certified quality management system ensures repeatable quality.
- Negotiate a pilot run: A small batch (e.g., 50–100 units) can help you validate the production line before committing to a container order. HAIYOU's factory in Nanchang, Jiangxi, can handle mixed SKUs (e.g., E-scooter lithium batteries and energy storage lead-acid batteries) in one shipment.
- Leverage certifications: HAIYOU holds ISO14001, ISO45001, and multiple patent certificates. These documents can be shared to reassure your end customers about safety and environmental responsibility.
- Plan for lead times: For bulk orders of, say, golf cart lithium batteries, HAIYOU typically delivers in 30–45 days (depending on quantity and customization). Their dual-factory structure (one lead-acid, one lithium) allows parallel production and faster turnaround.
- Establish clear quality benchmarks: Use the sample as a reference standard. Require the supplier to submit a factory test report (FTR) for each production batch. HAIYOU provides AQL inspection reports before shipment.
Why Choose HAIYOU as Your Sample Partner?
Founded in 2005, Jiangxi Jinhaiyou New Energy Resources Technology Co., Ltd. (HAIYOU) has two dedicated factories producing lead-acid batteries and lithium batteries. Their product range covers E-bike lithium batteries, E-tricycle lithium batteries, E-motorcycle lithium batteries, solar energy storage lithium batteries, golf cart lithium batteries, traction lead-acid batteries, and energy storage lead-acid batteries. With exports to 20+ countries and certifications including ISO9001, ISO14001, and ISO45001, HAIYOU offers sample policies tailored to serious buyers. Contact them today to request a sample and experience firsthand the quality that has earned them praise from Europe, America, Southeast Asia, and the Middle East.
Website: https://www.jxhylkj.com/
Phone/WhatsApp: +86 18870238656
Email: nancy.shi@jxhylkj.com
Factory Location: High-tech Industrial Park, Yugan County, Shangrao, Jiangxi, China
This guide is designed to help industrial buyers navigate the sample trial process with confidence. By following these steps and partnering with a certified manufacturer like HAIYOU, you can minimize risk and accelerate your path to successful bulk procurement.