OEM / ODM battery system design — from prototype to certified production. Specializing in AGV, medical, robotics, and industrial power applications with full CE · UN38.3 · IEC62619 compliance.
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COSOMIC is a full-system battery engineering company. We partner with product companies and hardware teams who need a reliable power subsystem — designed to their voltage, form-factor, communication protocol, and certification requirements.
From electrochemical architecture and BMS firmware to mechanical housing and compliance documentation, we deliver complete battery systems — not just assembled cells. Backed by CE, UN38.3, IEC62619 and ISO 13485 compliance pathways.
6+ years of battery system design, trusted by hardware teams across 50+ countries.
From electrochemical architecture to BMS firmware and mechanical housing — we design the entire battery system, not just assemble cells.
Every design starts with target-market compliance in mind. We engineer for certification, not retrofit it. Medical-grade ISO 13485 available.
Custom BMS architecture with protocol integration. Over-voltage, thermal runaway protection, and cell balancing built to your host system spec.
Validate your design with working samples in under two weeks. Scale seamlessly to mass production with consistent supply chain management.
Our battery systems power products across Europe, North America, Asia-Pacific, Middle East and Africa. Export-ready with all major international certifications.
www.oembatterypack.comEngineered across Li-ion, LiFePO4, solid-state, and semi-solid chemistries — each series optimized for specific voltage, discharge rate, and application requirements.
Showing 8 of 41 Products
Browse our full catalog — 8 series, 27 SKUs, CE / UN38.3 certified.
Grade-A cylindrical lithium-ion cells ready for immediate dispatch from our Foshan factory. Order from 1 pcs up to 10,000+ with T/T wire-transfer payment.
2000mAh · 3.7V/4.2V · Cylindrical
Batch Quantity
2600mAh · 3.7V/4.2V · Cylindrical
Batch Quantity
3000mAh · 3.7V/4.2V · Cylindrical
Batch Quantity
3500mAh · 3.7V/4.2V · Cylindrical
Batch Quantity
Trusted Partners
200+
Global Clients Served
50+
Countries Exported
1M+
Battery Packs Shipped
98%
Client Retention Rate
We do not sell generic batteries. We engineer certified power systems purpose-built for AGV robotics, medical devices, industrial equipment, and mobility platforms.
24V–48V custom packs with CAN/RS485 BMS communication for automated guided vehicles, warehouse robots, and AMRs.
UL/ISO 13485 certified, high-reliability battery systems for ventilators, infusion pumps, and portable diagnostic equipment.
High-discharge rate packs with robust IP67 housing for power tools, backup systems, and industrial portable equipment.
High-density, swappable Li-ion and LiFePO4 packs engineered for e-bikes, scooters, light EVs, and marine applications.
Scalable LiFePO4 and Na-ion modules for residential, commercial, and telecom ESS — IEC62619 certified.
Ultra-lightweight, high-C-rate LiPo and solid-state packs for commercial drones, mapping UAVs, and surveying platforms.
24V–48V custom packs with CAN/RS485 BMS communication for automated guided vehicles, warehouse robots, and AMRs.
UL/ISO 13485 certified, high-reliability battery systems for ventilators, infusion pumps, and portable diagnostic equipment.
High-discharge rate packs with robust IP67 housing for power tools, backup systems, and industrial portable equipment.
High-density, swappable Li-ion and LiFePO4 packs engineered for e-bikes, scooters, light EVs, and marine applications.
Scalable LiFePO4 and Na-ion modules for residential, commercial, and telecom ESS — IEC62619 certified.
Ultra-lightweight, high-C-rate LiPo and solid-state packs for commercial drones, mapping UAVs, and surveying platforms.
Real projects. Anonymized clients. Each case shows how we take technical requirements and turn them into certified, production-ready battery systems.
European Warehouse Automation OEM
97% fleet uptime
Result
A German warehouse automation company needed a battery that could sustain 24/7 operation across 300+ AMR robots, support opportunity charging at docking stations, and report real-time SOC to the fleet management system.
We designed a 48V 100Ah LiFePO4 pack with a custom CAN Bus 2.0B BMS, pogo-pin auto-charging interface, and ±2% SOC accuracy. The housing was engineered to match their AMR chassis slot dimensions exactly — no modification required on the robot side.
Key Specifications
Voltage
48V (LiFePO4)
Capacity
100Ah
Communication
CAN Bus 2.0B
Charging
Pogo-pin auto-dock
Cycle Life
3,000+ cycles
IP Rating
IP54
Certifications Achieved
Outcome
Fleet uptime increased from 83% to 97% after switching from lead-acid to our LiFePO4 system. Battery weight reduction of 62% improved robot payload capacity.
Have a similar engineering challenge?
Share your requirements — we'll tell you how we'd solve it within 24 hours.
From concept to mass production — we build custom cell battery packs precisely to your voltage, capacity, size, and application specifications.
Our Process
Full custom battery pack design — cell selection, BMS configuration, housing, firmware, and branding.
Flexible minimum order quantities starting from small prototype runs. Scale up seamlessly to mass production.
Every battery pack passes 100% capacity test, aging cycle test, safety test, and final visual inspection.
Battery packs certified for CE, UN38.3, RoHS, and IEC62619 to ensure worldwide market compliance.
Send us your specs and get a quote within 24 hours.
From e-bike OEMs in Europe to solar farms in Australia — see how global clients trust COSOMIC custom battery packs.
48V 17.5Ah E-Bike Battery Pack
12,000 pcs delivered in 3 batches over 8 months. Zero field failures reported. Client expanded order by 40% in Year 2.
48V 17.5Ah E-Bike Battery Pack
Challenge
Required IP65-rated battery with custom Hailong mounting, Samsung 21700 cells, and EN15194 certification for EU market entry.
Result
12,000 pcs delivered in 3 batches over 8 months. Zero field failures reported. Client expanded order by 40% in Year 2.
12,000+
Units Delivered
< 0.1%
Defect Rate
22 days
Lead Time
Join 200+ global clients who trust COSOMIC for their custom battery pack needs
Start Your Project200+ OEM clients across 50+ countries rely on COSOMIC TECHNOLOGY COMPANY LIMITED for consistent quality, fast delivery, and genuine engineering support.
“The most professional ODM service we’ve experienced. Fast prototyping and flawless BMS integration. From spec submission to approved sample in under 12 days — that kind of speed is a genuine competitive advantage for us.”
Jennifer R. 🇺🇸
Procurement Manager · US Medical Startup · United States
Clients from these countries & more
Reviews verified on
China produces over 70% of the world's lithium batteries. Here's why global OEM brands choose Chinese manufacturers — and why COSOMIC stands out among them.
Achieve 30% cost savings through integrated supply chains.
True OEM/ODM means your design, your BMS, your brand.
Every pack meets CE, UN38.3, and MSDS standards.
Engineering samples in 10 days, mass production in 25 days.
A practical comparison for global OEM buyers
Criteria
China OEM (COSOMIC)
Western Manufacturer
Unit Cost
Competitive
High
Lead Time (Sample)
7–15 days
4–8 weeks
MOQ Flexibility
From 10 pcs
500+ pcs
OEM Customization
Full custom
Limited
Certifications
CE, UN38.3, RoHS
CE, UL
Quality Control
100% tested
100% tested
Communication
English support
Native
Not all Chinese manufacturers are equal. Here's what sets COSOMIC apart.
CE & UN38.3 Certified
ISO 9001 Factory
200+ Global Clients
6+ Years Experience
98% Repeat Order Rate
English Sales Team
Technical deep-dives, product updates, and industry insights — all in one place.
A deep technical comparison of solid-state and semi-solid (gel-polymer) battery technologies — energy density, safety, manufacturing maturity, cost, and which is the smarter choice for your application right now.
Deep dive into solid-state battery safety — why ceramic electrolytes eliminate thermal runaway, how SSBs perform in abuse testing, and which safety-critical applications can benefit most.
Real-world applications of solid-state and semi-solid battery technology in 2026 — from foldable smartphones and medical wearables to electric aviation and premium EVs.
Sodium-ion batteries will not replace lithium-ion — they will complement it. A deep-dive into the "sodium-lithium dual-star" landscape: performance comparison, where sodium wins, where lithium remains unbeatable, and what the 2026–2030 roadmap looks like for OEM buyers.
Understand the key differences between lithium iron phosphate and lithium-ion NMC chemistries — energy density, cycle life, safety, cost, and which chemistry fits your application best.
A deep dive into Battery Management System architecture — protection functions, balancing methods, communication protocols, and how to specify the right BMS for your custom battery pack.
Learn how to accurately test your battery's real-world capacity using inexpensive tools — multimeters, DC loads, and even your inverter — to verify if your battery is performing as rated.
Learn how to design effective thermal management for lithium battery packs — from passive cooling with aluminum housings to active liquid cooling for high-power EV applications.
Join us at the Global Smart Energy Expo in Frankfurt this April to explore our latest LiFePO4 battery systems and grid-scale energy storage solutions.
Complete guide to selecting a battery charger — matching voltage profile to your chemistry, choosing charge current for speed vs longevity, and avoiding chargers that damage your battery.
We expand our EV battery lineup with a 72V 40Ah Li-ion pack featuring active air-cooling, 150A peak discharge, and full CAN Bus integration for light electric vehicles.
Deep dive into battery internal resistance (IR) — how it affects voltage sag, heat generation, efficiency, and how to measure IR on your own battery pack.
We are proud to announce the launch of our third-generation 100Ah LiFePO4 battery with 6000+ cycle life and built-in smart BMS for residential and commercial applications.
Practical guide to comparing battery weight and energy density across chemistries — Wh per kg, Wh per liter, and how to optimize your battery pack for weight-sensitive applications.
A practical guide to UN38.3 testing requirements, dangerous goods classifications, packaging standards, and documentation needed for international lithium battery transport.
Systematic troubleshooting for lithium batteries that refuse to charge — BMS faults, charger issues, temperature blocks, and connection problems with diagnostic steps.
CIBF 2027 in Shenzhen arrives at the critical intersection of global energy transition acceleration and the deepening of China's 15th Five-Year Plan. The exhibition will focus on three core industry trends: the "mass production year of solid-state batteries," the "explosive scaling of energy storage," and the "commercial landing of hydrogen energy." COSOMIC will showcase its latest custom battery pack, OEM battery manufacturing, and energy storage battery solutions across four key technology sectors.
At the 2026 International Energy Storage Battery Conference held in Yichang, Hubei, COSOMIC launched two groundbreaking storage cell products: a 440 Wh/L high-density cell with 15,000 cycles and 96% conversion efficiency, and a record-breaking 588Ah/790Ah large-capacity prismatic cell delivering 2,528 Wh per unit.
Join us at the Global Smart Energy Expo in Frankfurt this April to explore our latest LiFePO4 battery systems and grid-scale energy storage solutions.
We are proud to announce the launch of our third-generation 100Ah LiFePO4 battery with 6000+ cycle life and built-in smart BMS for residential and commercial applications.
Following rigorous third-party testing, our battery systems have successfully obtained UN38.3 and IEC62619 certifications, meeting the strictest international safety standards.
We have formalized a strategic distribution agreement covering 12 European countries, bringing our high-voltage EV battery packs to new automotive markets.
We are heading to South Korea for InterBattery 2026, Asia's premier battery trade show, to showcase our latest cylindrical Li-ion and prismatic LiFePO4 OEM packs.
At CES 2026, we presented our thinnest-ever custom polymer battery packs for wearables and portable devices, drawing interest from U.S. consumer electronics brands.
We expand our EV battery lineup with a 72V 40Ah Li-ion pack featuring active air-cooling, 150A peak discharge, and full CAN Bus integration for light electric vehicles.
Our new Smart BMS 4.0 introduces AI-driven cell health prediction, fault pre-warning, and cloud-based fleet monitoring for commercial battery deployments.
Our complete battery pack catalog has successfully passed its annual CE and RoHS recertification audit, ensuring continued compliance for European market entry.
New distribution partnerships in Thailand, Vietnam, and Indonesia will bring COSOMIC custom battery packs closer to the rapidly growing ASEAN energy storage market.
A 2-year joint research program will focus on next-generation solid-state electrolyte integration and fast-charging algorithms for lithium battery packs.
Access our product catalogs, technical datasheets, certifications, and compliance documents.
8 files available
Full product line brochures and specification sheets
12 files available
ISO, CE, UL, RoHS, FCC and other compliance documents
24 files available
Detailed technical datasheets for all product models
16 files available
Installation, operation, and maintenance guides
6 files available
Third-party lab test reports and quality verifications
5 files available
Product demonstration and installation tutorial videos
Get real-time stock updates, factory tour videos, and exclusive B2B pricing directly on our Facebook page. Join 500+ battery buyers who follow COSOMIC for the latest in OEM/ODM battery pack manufacturing.
18650 Cell Stock
Grade-A 18650 cells — 2000mAh to 3500mAh in stock. EXW China pricing.
New LiFePO4 48V 100Ah
Rack-mount energy storage battery pack — IEC62619 certified.
Factory Tour
Behind the scenes at our 3,000m² Foshan factory. 15 production lines.
Submit your battery requirements and we'll respond within 24 hours with a customized solution.
WhatsApp / WeChat / Tel
+86 158 8990 0503
oembatterypack002@gmail.com
Factory Address
Building 2, Floor 2, Zone B, Shihu Industrial Area, Yundonhai St., Sanshui District, Foshan, Guangdong, China
Business Hours
Mon – Sat: 9:00 AM – 6:00 PM (CST)
Certifications
Fill in your requirements and our team will prepare a tailored quote for you.
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