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China Custom Lithium Battery Pack Manufacturer
As a Hongyitai certified factory with 10 years of experience in the industry, we possess advanced automated lithium battery pack production lines and a professional R&D center. With an ISO9001 production system and strong supply chain integration capabilities, we use only Grade A cells (EVE, CATL, LG, Samsung) to ensure extremely high consistency.
We provide end-to-end OEM/ODM battery solutions, from cell grading and customized BMS design to final assembly. With complete UL, CE, and UN38.3 certification support and reliable scalable production capacity, we ensure you receive durable and reliable lithium battery packs.
Quality Rechargeable Lithium ion Battery Packs For Sale
We have strategic partnerships with multiple battery cell manufacturers, maintaining a stock of various battery cells and automated production lines. We adhere to high-standard cell sourcing, ensuring all cells undergo rigorous voltage, internal resistance, and capacity testing. We provide a full range of battery pack manufacturing solutions, from small portable devices to industrial-grade energy storage, guaranteeing you won’t encounter issues such as falsely advertised battery cell specifications, short cycle life, or delivery delays.
18650 Battery
We are a long-term supplier of high-quality 18650 battery cells from leading brands such as EVE, Bak, LG, and Samsung. These cells boast high energy density and high consistency, making them our most widely used cylindrical cells. Based on your battery pack performance requirements, we offer 18650 battery packs in multiple series and parallel connections, supporting customized brackets and soldering processes. We are committed to not using refurbished or salvaged cells, ensuring your safe and reliable application in your new products.
21700 Battery
Our 21700 cells offer high capacity (4000mAh to 5000mAh), high specific energy, and high power output, providing 5C and 10C high-rate, long-range battery pack solutions for electric vehicles and high-power tools brands, meeting your compact battery compartment space constraints, and providing excellent thermal management.
26650 Battery
We offer two chemical systems: a 3.2V 18650 LifePo4 battery and a 3.7V Li-ion battery. These batteries have a larger diameter, with individual cell capacities up to 6000mAh, excellent thermal stability, and high safety. They are commonly used in solar storage and high-lumen flashlights, meeting the long-term stable operation requirements of industrial equipment in extreme environments.
Button Battery
We manufacture LIR 3.7V miniature button coin batteries, which are small in size, have low self-discharge, and are leak-proof. They are commonly used in IoT devices, medical instruments, and smart wearable products to ensure power supply for high-precision electronic devices without corrosion.
Li ion Battery Pack Design & Assembly
We have a professional in-house engineering team and 10 advanced battery pack assembly lines, capable of handling everything from cell selection, electrical schematics, and industrial design. Our engineers will provide structural, PCM & BMS design, and sample testing tailored to your space requirements and power needs.
We support 3-day prototyping and provide 1 to 2 charging and discharging cycle data points, allowing you to quickly receive samples and verify their reliability.
Grade A Cells: 18650, 21700, and Prismatic Lifepo4
Our IQC rigorously screens Grade-A cells, including but not limited to 18650, 21700, and prismatic lifepo4 battery cells. We never use Grade B or salvaged cells, ensuring that the voltage, resistance, and capacity of every single cell strictly meet our requirements.
Based on your specific application, we precisely match the most suitable cell chemistry system for you, preventing the “weakest link” effect caused by poor cell quality and significantly reducing your return rate.
Precise Cell Matching
Our high-precision automatic cell sorting machines and internal resistance testers strictly control voltage difference ≤ 3 mV, capacity difference ≤ 20–30 mAh, and internal resistance difference ≤ 3 mΩ, ensuring that the battery pack maintains perfect balance during charge and discharge cycles. This prevents battery failure caused by overcharging or over-discharging of individual cells.
Custom BMS Integration for Enhanced Safety
We offer customized smart BMS (Battery Management System) that supports Bluetooth, RS485, CANbus, and other communication methods. It features multiple protection mechanisms, including overcharge, over-discharge, short circuit, and thermal protection, ensuring efficient battery operation.
We provide dedicated BMS parameter settings and support an app for real-time battery status monitoring, thus addressing your concerns about battery safety and enhancing user trust in your end products.
Precise Cell Matching
We offer flame-retardant PVC heat-shrink film and custom ABS/PC hard plastic shells, providing excellent impact resistance and waterproofing.
Our complementary shell mold development provides shockproof, moisture-proof, and corrosion-proof protection, meeting the needs of industrial equipment and outdoor products for long-term, high-efficiency operation.
Hongyitai Lithium Battery Pack Features
With a high energy density of up to 250Wh/Kg, it supports 3C, 5C, and 10C high-capacity battery discharge, and boasts a cycle life of over 500-2000 cycles.
Superior charging optimization technology and high-precision power calculation allow you to view the actual power level in real time via a mobile app, along with a smart balancing power scheme. We’ve solved your problems of rapid battery degradation and inaccurate power display, providing you with a highly efficient and reliable battery pack.
Compliance & Safety: Certified Lithium Battery Solutions (UL, CE, UN38.3)
We offer globally recognized certifications: UN38.3, MSDS, IEC62133, UL2054, CE, and the latest RoHS environmental certification. All certifications are based on third-party laboratory testing. Our engineers rigorously review regulatory compliance according to the requirements of your destination country, ensuring you obtain the necessary certifications without worry, facilitating fast customs clearance and compliance with local supermarket import guidelines.
Hongyitai Rechargeable Lithium ion Battery Pack Applications
Our lithium battery packs are widely used in e-mobility, medical devices, solar storage, and industrial IoT. We offer shock-resistant and IP65/67 waterproof designs to suit your operating environment and temperature.
Custom Voltage and Capacity Options (12V, 24V, 36V, 48V)
We offer flexible custom lithium battery designs, covering high-voltage battery packs from 3.7V to 12V, 24V, 36V, 48V, and 72V. We possess strong series and parallel combination capabilities, supporting capacity customization from small Ah to hundreds of Ah.
Based on your device’s power, operating current, and maximum discharge current parameters, we customize a battery pack with a BMS solution for you, bringing your ideas to life and meeting your specific needs for both high power and extended battery life.
How to Charge Lithium Battery Pack
We provide each customer with a unique lithium battery pack specification, offering detailed charging guidelines. All our export customers use Seiko PCBs from Japan, supporting accurate CC/CV charging protocols, robust overcharge protection, and temperature protection.
Furthermore, you can view the full charging voltage, fast charging current, and charging temperature range limits to prevent your battery from bulging or experiencing performance degradation due to overcharging.
Hongyitai One-Stop Battery Pack Assembly Service
We possess a complete one-stop battery pack assembly service system, covering the entire process from cell sorting, BMS design, mold development to finished product manufacturing. We provide initial design and prototyping, regular compliance supply, and shipping services.
Leveraging our efficient integrated supply chain and advanced automated assembly lines, we ensure you receive highly consistent and flexible order management systems, guaranteeing on-time delivery of your battery orders. Let us facilitate fast and efficient communication, precise battery quality traceability, and ultimately, deliver reliable, durable, and high-performance batteries to you. Learn custom lithium battery prices behind logic.
How to Start Your Custom Battery Pack with Hongyitai
We have a standardized Custom Battery Project Onboarding Process, where a professional sales manager will provide one-on-one consultation to discuss your technical needs.
The specific process is as follows: Provide your battery’s core parameters: current, capacity, voltage, operating time, maximum power, cable length, and connector. Our engineers will evaluate and prototype the battery for your verification and testing. Once your requirements are met, we will begin rapid mass production, with skilled QC inspectors at every stage.
We help you quickly bring your initial ideas to fruition, shorten your development cycle, and accelerate your product’s market launch.
Hongyitai Lithium ion Battery Pack Manufacturing Process & Tour
We have a modern 200+ square meter lithium-ion battery manufacturing plant, high-precision automatic spot welding machines, BMS testing systems, and high-capacity charging and discharging test cabinets. We pursue lean manufacturing, covering 12 processes from cell grading to OQC testing.
We support third-party factory audits and provide certifications and reports relevant to your country. Every batch of batteries has a corresponding OQC test report, reducing your after-sales worries.
Online Free Lithium Battery Pack Fast Calculator
FAQs About Lithium Battery
Yes, but with strict restrictions. Lithium batteries carried on board must have a rated energy of no more than 100 Wh; those with a rated energy between 100 Wh and 160 Wh require airline approval, and each person can bring a maximum of two batteries, which must still be carried on board and cannot be checked in.
Our regular orders can be completed within 15 days and shipped via DHL or sea delivery.
We can complete battery prototyping within 3 days, allowing you to receive and test them quickly.
We offer a 1-year warranty. If the damage is not caused by human error, we will replace or resend the battery free of charge.
The United States requires UL1642 and UN38.3 certifications.
Yes, we support trial orders of 10, 20, or more battery packs for you.
The battery cells we use most often are from EVE, LG, Samsung, and other Chinese cell brands.
