Engineered for demanding power environments, this 18.5V 3200mAh cylindrical lithium-ion battery pack delivers consistent energy within a highly compact footprint. At its core, five premium-grade 18650 cells are meticulously spot-welded in a 5-series, 1-parallel (5S1P) configuration. The exterior is tightly wrapped in a durable, industrial-grade heat-shrinkable PVC sleeve, providing a firm, solid tactile feel while protecting internal components from dust and moisture. Measuring a mere 38 by 38 by 68 millimeters and weighing approximately 200 grams, this dense power module integrates effortlessly into space-constrained enclosures. An intelligent Battery Management System (BMS) is hardwired into the assembly, actively monitoring voltage and thermal metrics to ensure operational stability. Equipped with pre-tinned silicone wires and customizable terminal connectors, it offers a plug-and-play solution that eliminates the need for secondary soldering, accelerating your assembly line processes.
Advanced Safety & Intelligent Protection: The integrated multi-layer BMS actively guards against overcharge, over-discharge, overcurrent, and thermal runaway. Combined with industrial-grade anti-vibration brackets, the internal structure maintains absolute integrity even during continuous high-rate discharge or high-frequency mechanical vibration.
Optimized Energy Density: Utilizing 3200mAh capacity 18650 cells, this module maximizes runtime without expanding the physical footprint, offering an exceptional power-to-weight ratio for portable equipment.
Durable Structural Engineering: Internal cells are secured using high-temperature-resistant polymer brackets, while the outer layer is sealed with high-strength shrink film or an optional rigid custom casing. This precise construction prevents contact loosening and absorbs mechanical shocks.
Rigorous Quality Control & Global Certifications: Before leaving the facility, every single unit undergoes over 100 stringent tests, including electrical performance screening, mechanical shock evaluations, and deep aging cycles under extreme temperatures. The product complies with UL, CE, UN38.3, IEC62133, and RoHS standards, ensuring smooth customs clearance and regulatory compliance for international trade.
Ready-to-Deploy Assembly: Delivered fully assembled, spot-welded, and factory-tested with the BMS and output terminals pre-installed. This eliminates secondary processing steps, directly reducing labor time and assembly costs on your production floor.
| Battery Cell Type： | Cylindrical Lithium-ion Battery (18605) |
| Configuration: | 5 Series 1 Parallel (5S1P) |
| Nominal Voltage: | 18.5V |
| Nominal Capacity: | 3200mAh |
| Energy: | Approximately 59.2Wh |
| Charging Voltage: | 21.0V (Standard) |
| Discharge Cut-off Voltage: | 15.0V (Controlled by protection board) |
| Standard Charging Current: | 0.5C (Approximately 1.6A) |
| Maximum Continuous Discharge Current: | Typically 1C (3.2A), depending on the cell model and protection board specifications |
| Finished Product Dimensions: | Approximately 38mm * 38mm * 68mm (excluding wires) |
| Wire Specifications: | Standard configuration includes two wires (red positive/black negative), wire length and terminal type (such as T-plug, XT60, DuPont connector, etc.) can be customized |
| Protection Functions: | Overcharge, over-discharge, overcurrent, short circuit, balancing (some models) protection |
| Operating Temperature: | Charging: 0°C ~ 45°C / Discharging: -20°C ~ 60°C (Recommended to use at room temperature to extend lifespan) |
| Weight: | Approximately 200g (for reference only) |
This 18.5V power module is engineered to drive medium-voltage applications that demand a superior balance of compact form factor and sustained energy output. It serves as a reliable core component across various demanding sectors:
Industrial Power Tools: Provides the necessary surge current for heavy-duty cordless drills, impact screwdrivers, and angle grinders, maintaining torque under heavy loads.
Robotics & UAVs: Delivers stable voltage for educational robotic platforms, competitive racing drones, and agile automated guided vehicles (AGVs), where weight reduction is critical.
Custom Electronic Engineering: Acts as the primary energy source for self-balancing scooters, automated model vehicles, marine vessels, and high-lumen portable LED lighting arrays.
Precision Instrumentation: Ensures uninterrupted operation for sensitive surveying gear, environmental testing devices, and emergency diagnostic equipment in remote locations.
Critical Backup Systems: Functions as a dependable mobile power reserve for specialized compact hardware, ensuring continuous functionality during primary power failures.
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To maintain optimal performance and extend the lifecycle of the lithium-ion module, strict adherence to the following operational guidelines is required:
Dedicated Charging Protocols: Always utilize a lithium-ion specific balance charger matching the 21V/2A electrical profile. The application of lead-acid chargers or non-compliant adapters will bypass internal safeguards and is strictly prohibited.
Physical Integrity Maintenance: Protect the outer casing from severe mechanical stress. Do not subject the module to short-circuiting, unauthorized disassembly, crushing impacts, or piercing, as this compromises the internal chemical stability.
Environmental Management: Store and operate the units away from direct thermal sources or high-humidity zones. For long-term inventory storage, maintain the ambient temperature below 60°C and keep the charge capacity balanced between 30% and 70% in a climate-controlled, dry facility.
Discharge Limits: Relying solely on the BMS for extreme over-discharge protection degrades cell chemistry over time. Recharge the module promptly when voltage drops near 15V, rather than waiting for automatic system cutoff.
Secure Integration: During device assembly, verify that positive and negative terminal connections are firmly secured. Loose wiring can generate electrical arcing or intermittent power loss under vibration.
End-of-Life Processing: Comply with local environmental regulations by routing depleted modules to certified industrial battery recycling facilities.
A1: No. Standard power adapters lack the intelligent constant current/constant voltage (CC/CV) algorithms required for lithium chemistry. They also cannot perform cell voltage balancing. Utilizing a non-dedicated adapter risks severe overcharging, thermal expansion, and potential failure. A dedicated lithium balance charger is mandatory.
A2: At peak capacity, the module registers approximately 21.0V across the terminals (4.2V per individual cell). When the integrated BMS engages its low-voltage disconnect to prevent deep discharge damage, the output is halted. Just prior to this cutoff, the system voltage typically measures around 15.0V (3.0V per cell).
A3: System integrators and end-users can verify remaining capacity using a calibrated digital multimeter across the main output leads. A reading near 18.5V confirms nominal operating capacity. If the measurement falls below 18.0V, the module has expended significant energy, and a recharge cycle should be initiated as it approaches the 15.0V threshold.
A4: Yes. We offer comprehensive structural and electrical customization. Engineering teams can specify exact wire lengths, silicone gauge thickness, and specific terminal connectors (including T-plugs, XT60, Anderson connectors, or stripped bare wires) to match your proprietary enclosure and PCB layout. Please consult our technical support team prior to procurement.
A5: Cycle life is contingent upon operational parameters. Under standardized conditions—maintaining ambient temperature, adhering to standard charge/discharge currents, and preventing deep over-discharge—these premium 18650 cells retain over 80% of their original capacity after 300 to 500 full cycles.
A6: Lithium-ion modules are classified under specific hazardous materials regulations for air and ground freight. We ensure all bulk shipments are packaged, insulated, and labeled in strict accordance with UN38.3 and international transport guidelines to ensure compliant transit.
Beyond standard configurations, we deliver comprehensive system-level OEM and ODM customization services tailored to your specific hardware requirements. Our engineering team collaborates directly with your designers to optimize everything from cell selection and smart BMS programming to advanced thermal management and custom wiring harness structures, ensuring a precise fit for specialized terminal devices.
Backed by standardized, automated production lines and a highly resilient supply chain, our manufacturing facilities boast substantial daily output capacities. This infrastructure guarantees stable, on-time bulk deliveries for large-scale procurement contracts. Furthermore, every customized or standard batch is supported by a comprehensive 12-month global warranty. Our dedicated R&D engineers provide 24/7 technical assistance, ensuring rapid resolution of any system integration challenges and safeguarding your long-term operational success.
