This product is a compact battery pack composed of high-quality lithium-ion cells (model 18650). Utilizing an advanced 5-series, 1-parallel (5S1P) connection method, it delivers a standard voltage of 18.5V and a stable capacity of 3200mAh. The battery pack features a sophisticated design with dimensions of only 19mm × 68mm × 93mm, combining high energy density with flexible installation adaptability.
The product integrates a high-performance intelligent protection board (BMS), effectively providing multiple safety protections against overcharging, over-discharging, overcurrent, and short circuits. All output terminals are equipped with standard connectors, ensuring convenient and reliable connections. This battery pack is an ideal DC power solution for driving various small and medium-sized electric devices and instruments, meeting the high standards of professionals and DIY enthusiasts with its long-lasting power, safety, stability, and plug-and-play features.
Product Advantage
High Energy Density, Long-Lasting Power: Utilizing high-quality power/capacity type 18650 battery cells, this battery pack boasts high energy density, providing up to 3200mAh of effective capacity in a limited space, ensuring long-term stable operation of your device.
Multiple Safety Protections for Peace of Mind: Built-in intelligent lithium battery protection board (BMS) monitors battery status in real time, providing precise protection against overcharging, over-discharging, overcurrent, and short circuits, ensuring the safety of both the battery cells and the connected equipment.
Precision Engineering, Stable and Reliable: Laser welding technology is used to connect the battery cells, resulting in low internal resistance and a secure connection. The entire assembly is encapsulated in flame-retardant material, providing a robust structure, excellent shock resistance, and effectively extending its lifespan.
Plug-and-Play, Convenient Integration: All assembly, testing, and aging processes are completed before shipment, and standard output terminals are provided. Users do not need to perform any welding or configure protection circuits themselves, allowing for quick integration into devices and saving development time.
Compact Design, Strong Adaptability: The regular, small rectangular shape design offers high space utilization, making it easy to layout and secure within devices, and adaptable to various equipment structures.
Technical Parameters
| Model： | 18650-5S1P (Custom models available upon request) |
| Nominal Voltage: | 18.5V |
| Nominal Capacity: | 3200mAh (0.2C discharge) |
| Cell Configuration: | 5 series 1 parallel (5S1P) |
| Cell Type: | Cylindrical Lithium-ion Battery (18650) |
| Dimensions (Length × Width × Height): | Approx. 93mm × 68mm × 19mm (including protection board and casing) |
| Weight： | Approx. 250g (For reference only, subject to actual product) |
| Charging Voltage： | 21.0V MAX (Must use the matching charger) |
| Discharge Cut-off Voltage: | 12.5V (Controlled by the protection board) |
| Standard Continuous Discharge Current: | 1C (i.e., 3.2A) |
| Maximum Continuous Discharge Current: | Please refer to the specific cell datasheet (usually 3.2A-10A) |
| Protection Functions: | Overcharge, over-discharge, overcurrent, short circuit, temperature protection (for some models) |
| Output Interface: | Wire with terminals (positive and negative poles, specific wire length and terminal type can be customized) |
| Operating Temperature： | Charging: 0°C ~ +45°C / Discharging: -20°C ~ +60°C (Recommended range) |
| Storage Temperature: | -20°C ~ +45°C (For long-term storage, half-charge state is recommended) |
Product Uses
This 18.5V lithium-ion battery pack is widely used in applications requiring a stable, portable, and rechargeable DC power source, such as:
Power tools: Small electric drills, electric screwdrivers, hot glue guns, engraving machines, etc.
Digital and outdoor equipment: High-power LED flashlights, photographic fill lights, outdoor monitoring equipment.
Instruments and meters: Portable measuring instruments, testing equipment, sensor power supply units.
Robotics and models: Power supply for small and medium-sized educational robots, model aircraft, and model boats.
DIY projects and backup power: Projects for electronics enthusiasts, small emergency power supplies, portable device power supply, etc.
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Product Precautions
Must use a dedicated charger: Please be sure to use a dedicated charger with matching voltage and current parameters (21V/lithium battery charging mode). It is strictly forbidden to use lead-acid battery chargers or other incompatible power sources for direct charging.
Strictly avoid short circuits: During use and storage, be sure to prevent the positive and negative terminals of the battery from coming into direct contact or being short-circuited by metal conductors.
Disassembly and puncturing are prohibited: It is strictly forbidden to disassemble, squeeze, puncture, or throw the battery into fire in any way, to avoid internal short circuits and resulting hazards.
Operating environment: Avoid using or storing the battery in high temperatures (above 60°C), open flames, humid environments, or near heat sources. Avoid prolonged direct sunlight.
Charging and discharging management: It is recommended to charge the battery promptly when the power is nearly depleted (the device indicates low battery), to avoid over-discharge. If not used for a long period (more than 3 months), it is recommended to perform a charge and discharge maintenance every 3 months, maintaining a charge level of approximately 50%-70% for storage.
Handling of abnormalities: If the battery becomes severely hot, deformed, smokes, or emits an unusual odor, stop using it immediately and move it to a safe, open area.
FAQ
Q1: Can this battery pack directly replace the original 18V NiCd/NiMH battery pack in my device?
A: The voltage matches (18.5V vs 18V), so it can usually be replaced directly, and the performance will be better. However, please make sure to confirm:
1) whether your device's voltage range includes this voltage;
2) whether the physical dimensions of the device's battery compartment can accommodate this product (93*68*19mm);
3) whether the interface terminals match. If they don't match, an adapter cable may be needed.
Q2: What is the specific function of the protection board?
A: The protection board is the "safety brain" of the battery pack. It continuously monitors the voltage of each cell and the total current. When the charging voltage is too high (overcharge), the discharge voltage is too low (over-discharge), the current exceeds the safe value (overcurrent), or there is accidental contact between the positive and negative terminals (short circuit), it will automatically cut off the circuit to protect the battery and the electrical appliance from damage.
Q3: What does the battery capacity "3200mAh" mean? How long can my device run on it?
A: mAh (milliampere-hour) is a unit of capacity. A simple estimate: device operating time (hours) ≈ battery capacity (3200mAh) ÷ device operating current (mA). For example, if your device's average operating current is 800mA, the theoretical usage time is approximately 4 hours. The actual time is affected by factors such as device power consumption fluctuations and ambient temperature.
Q4: Can you provide customization for different capacities, sizes, or interfaces?
A: Yes. We can customize battery packs according to customer needs, including different capacities (using higher capacity cells), different series and parallel configurations, specific dimensions, special output interfaces (such as XT60, DC connectors, etc.), and specific cable lengths. Please contact our sales or technical support staff for specific requirements.
Q5: How should I store the battery pack? What is the maximum storage time?
A: It is recommended to store it in a dry, cool environment (10°C-25°C is best). If you need to store it for more than one month, please keep the charge level at around 50%-70%. Under ideal conditions, the self-discharge rate of lithium batteries is about 2%-3% per month. It is recommended to charge the battery before use after long-term storage. Avoid long-term storage in a completely discharged or fully charged state.
