5S (18.5V) 18650 Lithium-Ion Battery Pack Manufacturer In China
Welcome to Hanery’s dedicated page for high-power 18.5V (5S) 18650 battery packs. By engineering five premium cells in series, we deliver a commanding 18.5V power platform essential for e-mobility and heavy-duty industrial applications. Our expertise in high-voltage BMS design, robust thermal management, and structural integrity ensures your powerful equipment performs flawlessly and safely.
The E-Mobility & Heavy Tool Standard
Intelligent High-Voltage BMS
Engineered for Massive Torque
Robust Structural Design
Competitive High-Volume Pricing
Tailored Pack Geometries
Safety
Low Self-Discharge
Long Lifespan
Reliability
18.5V 5S 18650 Li-ion Battery Pack Supplier In China
Hanery is your specialist B2B supplier for custom-engineered 18.5V (5S) 18650 battery packs. Stepping up to a 5S configuration is a major leap into high-power applications, moving beyond simple electronics into the realm of kinetic energy and substantial power storage. Designing an 18.5V pack demands a rigorous, system-level approach to electrical safety, thermal dissipation under heavy load, and precise 5-node voltage management to prevent catastrophic imbalances.
As your direct manufacturing partner, we act as your high-voltage engineering department. We meticulously select high-discharge 18650 cells to match your motor’s torque profile, integrate industrial-grade Battery Management Systems (BMS) capable of handling massive amperages, and utilize robust spot-welding techniques with pure nickel. The result is a certified, high-voltage power solution that is as tough, powerful, and reliable as the professional equipment or vehicle it drives.
Wholesale 5S (18.5V) 18650 Lithium-Ion Battery Packs From Hanery
Is Your E-Mobility Device or Power Tool Struggling Under Load?
Overcome performance bottlenecks with a robust 18.5V platform. Our expertly engineered 5S packs utilize low-IR cells and heavy-duty busbars to deliver massive, sustained power without faltering.
Any Industries Hanery Served By Custom 5S 18650 Batteries
The formidable 18.5V power delivery and massive scalability make 5S packs essential for heavy-duty, high-drain, and mobility applications:
Light Electric Vehicles (LEVs)
Providing the high voltage and capacity required for e-scooters, electric skateboards, and e-bikes.
Professional Power Tools
Driving the high-torque motors in professional-grade impact wrenches, rotary hammers, and large circular saws (often branded as 18V or 20V Max).
Commercial & Industrial Drones
Delivering massive discharge required for heavy-lift aerial photography, agricultural spraying, and mapping UAVs.
Portable Power Stations & Solar Generators
Forming the high-capacity, high-voltage core modules for mid-size off-grid energy storage solutions.
Advanced Robotics & AGVs
The primary power source for automated guided vehicles and sophisticated service robots requiring high sustained power.
Professional Cleaning Equipment
Energizing commercial cordless vacuum cleaners, floor scrubbers, and industrial sweepers.
Customized Your 5S 18650 Batteries From Chinese Manufacturer
We engineer standard cells into industrial-strength, high-voltage systems:
Massively Scalable Configuration (S & P)
We design highly scalable packs (from slim 5S1P to massive 5S4P+) to achieve your exact 18.5V capacity requirements.
Industrial-Grade 5-Node BMS
Safety is paramount at 18.5V. Our advanced BMS provides precise 5-cell active/passive balancing, deep thermal monitoring, and extreme over-current protection.
High-Current Architecture
For demanding tools and LEVs, we utilize High-C cells, heavy-gauge silicone wiring, and thick pure nickel spot-welding to handle massive amp draws safely.
Advanced Thermal Dissipation
The larger 5S architecture is carefully designed with cell spacing, specialized cell holders, and (optional) thermal interface materials to manage heat during high-load operations.
Ruggedized & Shock-Proof Enclosures
We can design highly durable hard cases, robust shrink-wrapping with structural end-plates, or custom injection-molded housings to withstand severe vibrations and impacts.
Comprehensive Certification Management
We handle the complex safety and transport certifications (UN38.3, UL 2271, IEC 62133) required for large, multi-cell 18.5V packs used in mobility and industrial applications.
Get Your Batteries in Bulk, Step-by-Step
Consultation & Load Profiling
We start by deeply analyzing your application's power demands (continuous/peak Amps, stall torque), target voltage (18.5V), capacity (Ah), and strict physical/thermal constraints.
Pack Engineering & Proposal
Our engineering team provides a detailed proposal with a pack schematic, thermal management strategy, 3D models, and a transparent wholesale quote.
Prototyping & System Validation
We deliver functional, high-power pre-production samples for your rigorous testing and system integration validation under heavy load.
Refinement & Final Approval
We incorporate your feedback, finalize the BMS programming, and lock in the design before scaling up.
High-Volume Pack Assembly
Your bulk order is produced with exceptional consistency on our dedicated, automated pack assembly lines.
Global Logistics & Compliant Delivery
We manage the entire, often complex, compliant shipping process for high-energy batteries to your global locations.
6 Benefits From Your Battery Manufacturer
Industrial-Grade Endurance
We engineer 5S packs with high-capacity 18650 cells to provide the massive, sustained energy reserves required for all-day operation in demanding environments or long commutes.
Unleashed Peak Performance
By stepping up to 18.5V, your device can draw more power with significantly less current, reducing heat and unlocking the true torque and speed potential of high-performance motors.
Advanced Thermal Management
High-power 5S packs generate significant heat. Our meticulous pack design, specialized cell holders, and intelligent BMS active monitoring prevent thermal throttling and ensure safety under heavy loads.
Precision 5-Node Cell Balancing
Safety at 18.5V is non-negotiable. Our sophisticated BMS precisely monitors and balances all five series strings, maximizing the pack's cycle life and preventing catastrophic imbalances.
Ruggedized Custom Geometries
Whether you need a compact block for an e-skateboard or a specific shape for a power tool handle, we customize the 5S layout and robust housing to survive your device's operating conditions.
Full Certification Compliance
High-energy 18.5V packs face strict regulations, especially for mobility (e.g., UL 2271). We manage the entire certification process, ensuring your product is compliant and ready for global distribution.
18650 Battery Tips
FAQ for 5S (18.5V) 18650 Battery Packs
In most cases, they are exactly the same. A 5S lithium-ion battery has a nominal voltage of 18.5V (5 x 3.7V). However, when fully charged, each cell reaches 4.2V, making the peak or maximum voltage 21V (5 x 4.2V). Many tool brands market the “20V Max” peak voltage for marketing purposes, but the internal 5S architecture is identical.
The 18.5V platform provides a “sweet spot” for power-to-weight ratio. It offers enough voltage to efficiently drive powerful brushless motors, delivering high torque and speed, without requiring the excessive weight, size, and complex safety management of much higher voltage systems (like 36V or 48V).
A 5S pack must be charged with a dedicated charger outputting exactly 21.0V (5 cells x 4.2V max per cell). Using an incorrect charger is extremely dangerous.
Thermal management is critical for 5S packs. We utilize low internal resistance (low-IR) cells to minimize heat generation at the source. More importantly, we use specialized plastic cell holders that create physical air gaps between the cells, allowing heat to dissipate, rather than packing them tightly together. The BMS also includes multiple temperature sensors for active thermal protection.
“5S” means 5 cells in Series (determining the 18.5V). The “P” stands for Parallel. A 5S2P pack has 2 parallel strings (doubling the capacity); a 5S4P pack has 4 parallel strings (quadrupling the capacity). A 5S4P pack contains 20 cells in total (5×4) and is designed for extremely long runtime or very high power delivery.
Yes, if engineered correctly. In a 5S4P pack, the heavy discharge current is shared across the 4 parallel cells in each string. This means each individual cell experiences less stress, allowing the pack as a whole to safely deliver a massive continuous current, making it ideal for heavy robotics or long-range LEVs.
Absolutely. For applications like professional power tools or high-performance drones, we utilize specialized High-C 18650 cells capable of 20A, 30A, or more continuous discharge, paired with a heavy-duty BMS to unleash maximum performance.
Due to the engineering complexity, custom BMS requirements, specific cell holders, and safety testing involved with 5S packs, our Minimum Order Quantity (MOQ) typically starts around 10,000 units for professional and industrial applications.
It depends strictly on the pack’s total energy capacity (Watt-hours or Wh). The FAA/IATA limit for carry-on is generally 100Wh (up to 160Wh with airline approval). A 18.5V 2500mAh (5S1P) pack is 46.25Wh, so it flies easily. However, a 18.5V 24000mAh (5S4P) pack is 444Wh; this far exceeds passenger limits and must be shipped as dangerous goods via cargo. We can design packs to meet specific airline limits.
To provide an accurate design and quote for a 5S system, our engineers need:
Target Capacity (mAh or Ah): How long must the device operate?
Continuous & Peak Discharge Current (Amps) / Motor Wattage: The most critical factor for 5S; it determines cell choice and BMS rating.
Maximum Dimensions: The exact L x W x H of the battery compartment.
Application & Environment: E.g., an e-scooter outdoors (impacts thermal, vibration, and waterproofing design).
Wiring & Connectors: Required wire gauge (AWG), length, and high-current connector type (e.g., XT90, Anderson Powerpole).
Estimated Annual Volume.