Why Equipment Manufacturers Trust Our 18650 Battery Packs
We've been engineering custom lithium battery solutions since 2010, helping companies worldwide power their innovations with reliable, certified battery packs.
Years in Business
Over a decade perfecting 18650 pack assembly, testing, and quality control for demanding applications
Packs Delivered
Proven track record supplying AGV manufacturers, medical device OEMs, and e-mobility brands
Quality Testing
Every pack undergoes capacity testing, voltage matching, and safety checks before shipping
Days Lead Time
Fast turnaround on custom configurations — from your specs to production-ready packs
18650 Battery Pack Solutions by Voltage
Browse our range of pre-engineered configurations, or let us know your exact voltage, capacity, and size requirements for a custom build.
3.7V 1.8Ah Battery Pack
Capacity: 1.8/ 6/ 4/ 5.2/ 62.4/ 12Ah/ 6.6Ah
Configuration: 1S (single cell)
7.4V Battery Pack
Capacity:2.4/ 2.6/ 3.5/ 5/ 5.2/ 6.6/ 7.8/ 8.8Ah/ 2600mAh
Configuration: 2S
11.1V Battery Pack
Capacity:2/ 2.2/ 3/ 3.6/ 4.4/ 5.2/ 6/ 6.6/ 9/ 10/ 10.4/ 14/ 15/ 40/ 60Ah
Configuration: 3S
14.8V Battery Pack
Capacity:4.8/ 6.6/ 8.8/ 12/ 19.2/ 24Ah
Configuration: 4S
24V-25.9V Battery Pack
Capacity:2/ 2.2/ 4/ 5.2/ 10.4/ 20Ah
Configuration: 8S
36V Battery Pack
Capacity: 4/ 6/ 10Ah
Configuration: 12S
48V Battery Pack
Capacity:10/ 40Ah
Configuration: 16S
60V Battery Pack
Capacity:2.2/ 60Ah
Configuration: 20S
Don't See Your Configuration?
We build custom 18650 packs from 3.7V to 72V, 500mAh to 100Ah+. Tell us your voltage, capacity, size, and discharge requirements.
Request Custom ConfigurationInside Our Manufacturing Process
See how we engineer, assemble, and test every battery pack before it reaches your production line.
Engineering Custom Solutions
Our R&D team turns your specifications into production-ready battery packs. From initial CAD layouts to prototype validation, we handle the entire design process.
- Cell selection and capacity matching analysis
- 3D modeling for custom enclosure fitment
- BMS programming and discharge curve optimization
- Thermal simulation and heat dissipation design
- Connector and wiring harness customization
- Safety certification documentation prep
Precision Assembly at Scale
Every pack is assembled in our clean-room facility with automated equipment and manual quality checkpoints throughout the process.
- Automated cell sorting by voltage and capacity
- Laser or spot welding with pure nickel strips
- Fish paper insulation between cell layers
- BMS calibration and function testing
- Fire-resistant ABS bracket assembly
- Heat-shrink or hard case encapsulation
- Connector soldering and wire strain relief
100% Testing Before Shipping
No battery pack leaves our facility without passing comprehensive testing. We don't sample test — we test every single pack.
- Full charge/discharge cycle testing
- Capacity verification at 0.2C rate
- Internal resistance measurement
- BMS trigger testing (overcharge/overdischarge)
- Thermal imaging for hot spots
- Voltage balance check across all cells
- Drop test and vibration testing (optional)
- Final visual inspection and labeling
Dimensions & Connection Interface
Every custom pack comes with detailed CAD drawings and clear interface specifications so your integration is plug-and-play.
Physical Dimensions
- Customizable: We design to fit your enclosure
- Standard tolerance: ±2mm
- Mounting options: Screw holes, Velcro, brackets
Interface & Connectors
- Discharge port: XT60, XT90, Anderson, T-plug, or custom
- Charge port: DC jack, barrel connector, or same as discharge
- Cable spec: 12AWG silicone wire, 30cm length standard
- Balance port: JST-XH connector (if requested)
Smart BMS & Internal Craftsmanship
What's inside matters. Here's how we build packs that last.
Battery Management System
Our BMS isn't just a circuit board — it's your pack's brain, protecting every cell and extending lifespan.
- Overcharge Protection (OVP): Cuts off at 4.25V per cell
- Over-discharge Protection (UVP): Disconnects at 2.5V per cell
- Overcurrent Protection (OCP): Prevents excessive discharge
- Short Circuit Protection (SCP): Instant cutoff on fault
- Temperature Monitoring (OTP): NTC sensors on cells
- Cell Balancing: Active or passive (configurable)
- Optional Bluetooth: Real-time monitoring via app
Internal Build Quality
Premium Assembly Materials
We don't cut corners on materials. Your pack is built with components designed for long-term reliability.
- Pure nickel welding strips: 0.15mm thick, low resistance
- Spot welding: Dual-pulse for strong bonds
- Fire-resistant ABS brackets: V0-rated flame retardant
- Fish paper insulation: Between cell layers and terminals
- Heat-shrink wrapping: PVC or PE, custom colors available
- Hard case option: ABS or aluminum enclosures
Where Our 18650 Packs Power Innovation
From medical devices to e-mobility, our battery packs deliver reliable energy across diverse applications.
E-Bikes & E-Scooters
High discharge rates for motor power, long cycle life for daily commutes
AGV & Robotics
Custom shapes for tight spaces, reliable performance for 24/7 operations
Medical Equipment
Ventilators, oxygen concentrators, fetal monitors — certified for healthcare
Solar Energy Storage
Street lights, garden lights, monitoring systems — off-grid power solutions
Industrial Instruments
Flaw detectors, gas analyzers, meters — rugged packs for field work
Portable Power
Backup power supplies, emergency starters, outdoor power stations
LED Lighting
Work lights, fishing lights, emergency lighting — long runtime solutions
Consumer Electronics
Vacuum cleaners, fascia guns, fans — safe, certified for home use
Full Customization for Your Product
Stop compromising. Get the exact battery configuration your equipment needs.
Custom Voltage & Capacity
From 3.7V to 72V, 500mAh to 100Ah+. We configure series-parallel arrangements to match your power requirements exactly.
Custom Shape & Size
Triangular? L-shaped? Ultra-slim? Send us your enclosure dimensions and we'll design a pack that fits perfectly.
Cell Brand Selection
Choose Samsung, LG, Panasonic, Sanyo, or premium domestic brands. We'll recommend the best option for your budget and performance needs.
BMS Features
Need Bluetooth monitoring? CAN bus communication? Heating pads for cold climates? We program BMS to your specs.
Connectors & Cables
Specify your preferred connectors, wire gauge, cable length, and even custom pinouts. We match your existing system.
Private Labeling
Your logo, your brand, your packaging. We offer white-label services so the pack looks like it came from your factory.
Preguntas frecuentes
Common questions from equipment manufacturers and OEM buyers.
Custom designs (first order): 15-20 business days including prototype validation
Repeat orders: 10-12 business days
Rush orders: 5-7 days available for urgent needs (rush fee applies)
Note: Lead times don't include shipping. Express air shipping to North America/Europe takes 3-5 days; sea freight takes 25-35 days.
Extended warranty: 24 months available for high-volume orders
Warranty covers manufacturing defects, BMS failures, and premature capacity loss (below 80% rated capacity within warranty period). It does not cover physical damage, water ingress, reverse polarity connection, or use outside specified temperature ranges. We replace defective packs or provide pro-rated credit for partial failures.
Established customers: 30% deposit, 70% before shipping
Large repeat orders (>$50k): Net 30 terms available after credit review
We accept wire transfer (T/T), PayPal (for orders <$3000), and letter of credit (L/C) for large contracts. Credit card payment available through PayPal invoice.
About Nuranu Energy
Leading manufacturer of high-quality rechargeable lithium batteries since 2012
What We Deliver to Your Success
With 12+ years of proven expertise in battery manufacturing, we partner with businesses worldwide to power their innovations. Our commitment is simple: deliver reliable, high-performance lithium battery solutions that drive your success.
🏭 Massive Production Capacity
500,000+ units monthly production capacity ensures we meet your volume requirements on time, every time.
From prototype to mass production, we scale with your business needs.
🌍 Global Trust & Experience
Serving customers in 50+ countries across North America, Europe, and Asia.
Nuestra 98% customer satisfaction rate reflects our dedication to quality and service excellence.
✅ Complete Certification Support
8+ international certifications (CE, UN38.3, UL, RoHS, IEC 62133, etc.) ensure your products meet global market requirements.
We handle compliance so you can focus on your business.
👥 Expert Engineering Team
Nuestra 100+ professional team members provide comprehensive technical support—from custom design to after-sales service.
Your challenges are solved by experienced battery specialists.
⚡ Fast, Flexible Solutions
Rapid prototyping, ODM/OEM customization, and flexible production schedules adapt to your project timelines.
We accelerate your time-to-market without compromising quality.
International Certifications
Our batteries are certified by leading international organizations, ensuring safety, quality, and compliance
Our Capabilities
Advanced facilities and professional expertise across R&D, production, and quality control
Advanced R&D Center
Our state-of-the-art R&D center is equipped with cutting-edge testing equipment and staffed by experienced engineers dedicated to innovation and technological advancement in battery solutions.
- Battery cell development and optimization
- BMS (Battery Management System) design
- Custom battery pack engineering
- Performance and safety testing protocols
- New material research and application
- Continuous product improvement programs
Modern Production Facility
Our ISO-certified manufacturing facility features automated production lines and strict quality control processes, ensuring consistent high-quality output with a monthly capacity exceeding 500,000 units.
- Automated assembly production lines
- Dust-free workshop environment
- Advanced welding and sealing technology
- Precision battery pack assembly
- Real-time production monitoring systems
- Flexible customization capabilities
Comprehensive Quality Inspection
Every battery undergoes rigorous testing through multiple stages of quality inspection, from incoming materials to final products, ensuring 100% compliance with international safety and performance standards.
- Incoming material quality verification
- In-process quality control checkpoints
- Capacity and voltage testing
- Safety performance evaluation
- Environmental stress testing
- Final product certification and documentation
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