Custom Lithium-Ion (Li-ion) Battery Manufacturer & Wholesale
Hanery is a premier manufacturer specializing in 18650 and 21700 lithium-ion battery cells and custom pack assembly. From standard 3.7V cells to high-voltage industrial battery modules, we provide engineered power solutions for global B2B partners.
- Voltage Range: 3.7V — 72V+ (Customizable Packs)
- Cell Types: Grade A 18650 & 21700 Cylindrical Cells
- Discharge Rate: 3C – 10C (High-drain power solutions)
- Certifications: UN38.3, MSDS, CE, UL1642, IEC62133
Safety
Low Self-Discharge
Long Lifespan
Reliability
Professional Lithium-Ion Battery Pack Supplier In China
Hanery harnesses the power of industry-standard cylindrical lithium-ion cells like the 18650 and 21700 to build robust and reliable energy solutions. Praised for their exceptional energy density, durability, and cost-effectiveness, these cells form the backbone of countless demanding applications, from power tools to electric vehicles.
Our core expertise lies not just in sourcing high-quality cells, but in the intricate engineering of custom battery packs. We design and assemble complete systems with intelligent Battery Management Systems (BMS), custom enclosures, and full safety certifications, turning standard cells into a bespoke power solution perfectly matched to your product.
Lithium Ion Battery Cell & Pack
4S 18650 Battery
5S 18650 Battery
6S 18650 Battery
21700 Battery
1S 21700 Battery
2S 21700 Battery
3S 21700 Battery
Didn't find your configuration? Let's Start a Custom Design.
The possibilities are endless. We can build a custom battery pack with any voltage, capacity, and size to meet your exact needs.
Applications Powered by Hanery Li-ion Batteries
The robustness and power of cylindrical cells make them the ideal choice for demanding industries.
Energy Storage (ESS)
Solar energy storage, UPS backup, and home battery systems.
Industrial Robotics
AGVs, automated warehouse robots, and drones.
Medical Devices
Mobile medical carts, respirators, and diagnostic tools.
Power Tools
Cordless drills, industrial saws, and gardening equipment.
Smart Home & IoT
Robotic vacuum cleaners, portable fans, and outdoor lighting.
Electric Mobility
E-bikes, electric scooters, and golf carts.
Why Choose Hanery for Your Lithium Ion Batteries?
Choosing Hanery means partnering with a supplier that prioritizes precision, safety, and performance. We bridge the gap between complex engineering requirements and scalable manufacturing, ensuring every 18650 and 21700 battery pack meets the highest industrial standards.
Strict Cell Matching
Every cell in our packs is precision-matched for internal resistance, voltage, and capacity to ensure long-term stability.
Smart BMS Integration
Our packs feature custom-engineered Battery Management Systems (BMS) with multi-layered safety protection.
Industrial-Grade Welding
We utilize advanced high-precision spot welding technology and high-purity nickel tabs for optimal conductivity.
Rigorous Aging Tests
100% of our battery packs undergo complete charge-discharge aging cycles before shipment to ensure zero-defect quality.
Global Compliance
Our manufacturing processes and products are fully certified with UN38.3, MSDS, CE, and IEC62133 for global distribution.
Scalable Production
Our automated production lines are designed to handle both specialized small-batch R&D and large-scale wholesale orders.
Get Your Custom Li-ion Batteries in Bulk, Step-by-Step
In-Depth Consultation
We analyze your device’s specific power requirements, dimensions, and environment to define the optimal cell chemistry.
Engineering & 3D Modeling
Our engineers create detailed 3D designs of the cell layout and housing, ensuring a perfect fit for your application.
BMS & Firmware Tailoring
We select or design the ideal BMS, configuring safety thresholds and communication protocols (SMBus/I2C/CAN) if required.
Rapid Prototyping
We produce functional sample packs for your team to test for fit, performance, and thermal behavior in real-world conditions.
Validation & Certification
Samples undergo rigorous internal testing. We also assist in obtaining necessary global safety certifications for your final pack.
Mass Production & Logistics
Upon approval, we transition to automated assembly, followed by secure, compliant global shipping with full documentation.
Lithium Ion Battery Tips
Custom Li-ion Batteries FAQ
The numbers refer to the size: 18650 is 18mm in diameter and 65mm long, while 21700 is 21mm in diameter and 70mm long. The larger 21700 cell offers a significantly higher energy capacity and often a higher discharge capability, making it popular for new, high-power designs.
This describes the pack configuration. “S” stands for Series, which increases voltage (e.g., 2S = 7.4V). “P” stands for Parallel, which increases capacity (e.g., 3P = 3x the capacity of a single cell). A 4S3P pack has 4 cells in series and 3 rows in parallel, for a total of 12 cells.
Yes. We can configure cells in series (S) for higher voltage (e.g., 24V, 36V, 48V) and parallel (P) for higher capacity to meet specific robotic power needs.
Standard cell prototypes take 7-10 days, while complex packs with custom BMS and housings usually require 15-20 days.
Absolutely. We offer 18650 and 21700 cells with 3C, 5C, and even 10C continuous discharge ratings to handle high-torque motor demands.
For air and sea freight, UN38.3 and MSDS are mandatory. We provide these along with CE and IEC62133 for European market compliance.
We use precision-spaced cell holders and heat-dissipating materials to ensure optimal airflow and temperature regulation during high-drain operation.
Yes, we provide full structural design services, including custom injection-molded plastic shells or rugged metal housings for industrial use.
Our MOQ for custom packs is typically 500-1000 units, depending on complexity, but we support smaller batches for initial R&D phases.
They should be stored at 30%-50% state of charge (SOC) in a cool, dry environment. We recommend a maintenance charge every 3-6 months.