Umax manufactures 18650, 21700, polymer & semi-solid battery packs for drones, robotics, industrial equipment and energy storage -- from cell selection and BMS integration to full OEM delivery.
From standard cylindrical cells to advanced semi-solid technology -- choose the platform that fits your application and performance requirements.
The most mature cylindrical cell format. Stable supply chain, wide brand selection, proven reliability. Ideal for tools, robotics, medical devices, and portable power.
Higher single-cell capacity, fewer connections, better system efficiency. Ideal for e-bikes, power tools, large drones, industrial equipment, and mobile energy storage.
Lightweight, thin, and fully customizable in shape. Excellent for drones, wearables, medical devices, and any application where space and weight are critical.
Higher energy density, improved safety over conventional liquid electrolyte. Ideal for long-endurance drones, high-end robotics, and demanding industrial applications.
Share your voltage, current, application, and quantity. Our engineers evaluate cell chemistry, BMS configuration, thermal management, and structure to deliver a pack optimized for your device -- not a generic product.
Different industries demand different battery characteristics. We engineer each pack to match the real working conditions of your application.
High energy density, high-rate discharge, lightweight structure for extended flight time.
Stable long-cycle packs with smart BMS communication for autonomous systems.
High continuous current, robust thermal management, durable cycle performance.
High capacity, excellent cycle life, consistent cell matching for reliable storage systems.
Certified, reliable, stable voltage output. Safety-first design with full documentation.
Smart communication interfaces, wide temperature range, compact form factors.
Backup power and portable communication devices demanding stable, long-lasting energy.
Outdoor power stations, emergency backup, and mobile energy with high capacity and safety.
6 production lines handling everything from 50-piece prototypes to large-scale OEM orders -- with full process control at every stage.
Optimized for stable, repeatable models requiring consistent quality and throughput. Automated cell sorting, spot welding, and testing -- maximizing efficiency and pack-to-pack consistency.
Skilled technicians handling complex structures, irregular shapes, special connectors, low-MOQ samples, and highly customized packs that require hands-on precision assembly.
Every batch goes through systematic inspection and testing. We don't rely on sampling alone -- critical parameters are verified at each production stage to catch defects before they reach your device.
We understand the documentation, packaging, and communication requirements of international B2B battery procurement. Our team handles every step from order confirmation to delivery.
Trusted by B2B buyers in 40+ countries
USA · Germany · UK · France · Netherlands · Australia · Japan · South Korea · Canada · Israel · UAE · India · Brazil · Mexico · Southeast Asia · and more
We go beyond standard production. Every customer gets application-specific engineering, transparent communication, and a long-term supply relationship.
We analyze your actual device: working voltage, current draw, duty cycle, temperature range, weight limit. Then we select cells, design BMS parameters, and size wiring to match -- not guess.
Samsung, LG, Panasonic, Molicel, EVE, BAK, Lishen -- we know each cell strengths and match the right chemistry to your performance and budget requirements.
Every cell is sorted by capacity, internal resistance, and voltage before assembly. Tightly matched cells reduce imbalance, extend cycle life, and eliminate premature protection triggers.
Each project gets a dedicated technical contact who handles specification confirmation, sample development, testing feedback, and production handoff -- no lost-in-translation issues.
Start from 50 pieces. Sample delivery in 7-14 days. We support your product development cycle -- from prototype validation to mass production scale-up without switching suppliers.
We have shipped to 40+ countries. UN38.3, MSDS, English documentation, compliant packaging, and logistics coordination -- everything your procurement and compliance teams need.
Share your voltage, current, application, and quantity -- our engineers will respond with a tailored solution within 24 hours.
Our minimum order quantity starts from 50 pieces. This applies to both standard and custom battery packs. For prototype samples or engineering validation, we can often accommodate smaller quantities -- please contact us with your specific project details.
For custom battery packs, sample delivery is typically 7-14 business days after design confirmation and deposit payment. Simple configurations with standard cells may be faster. Complex designs with special housing or communication BMS may require additional time.
Yes. We fully customize voltage (3.7V to 52V+), capacity, continuous discharge current, connector type (XT30, XT60, XT90, EC5, Anderson, JST, Molex, and more), wire gauge, wire length, housing type, and BMS protection parameters. Share your device specifications and we will engineer a matching solution.
We work with Samsung, LG, Panasonic, Molicel, Murata, EVE, BAK, and Lishen -- among others. Cell selection depends on your performance requirements, budget, and application. We recommend the best match after evaluating your working current, temperature range, cycle life target, and cost constraints.
Yes. We provide UN38.3 transport safety certificates, MSDS (Material Safety Data Sheets), and per-batch test reports. These documents are standard for lithium battery air and sea freight. We can also prepare custom specification sheets and OEM documentation as needed.
Absolutely. We support full OEM and ODM services including custom labels, product model numbers, packaging design, warning text, QR codes, and serial number management. Your brand, your packaging -- manufactured and tested at our factory.
We support SMBus, CAN, UART, and RS485 communication interfaces for smart BMS applications. These allow your system to monitor cell voltage, current, temperature, state of charge (SOC), and fault status in real time. Custom communication protocols can be evaluated on a per-project basis.
Before assembly, every cell is individually tested for voltage, internal resistance, and capacity. Cells are sorted and grouped so that all cells within the same pack fall within tight tolerance bands. This reduces cell imbalance, extends cycle life, and prevents premature BMS protection triggers during normal operation.
Mass production lead time is typically 15-25 business days after sample approval and deposit confirmation. Lead time varies based on order volume, cell availability, housing complexity, and BMS configuration. We provide a detailed production schedule with each confirmed order.
Yes. We have extensive experience shipping lithium batteries internationally via air freight (with UN38.3 compliance), sea freight, and express courier. We prepare all required export documentation and can work with your designated freight forwarder or recommend trusted logistics partners.
Still have questions? Our engineers are ready to help.
Contact Our Team