This product is a compact battery pack composed of high-quality 18650 cylindrical lithium-ion cells, configured as 2 series and 1 parallel (2S1P). Its design is exquisite, with dimensions of only 19mm x 38mm x 68mm, perfectly balancing energy density and space efficiency. The battery pack has a nominal capacity of 3200mAh and a nominal voltage of 7.4V. It integrates a high-performance protection circuit board and comes pre-wired with terminals, enabling convenient plug-and-play functionality. It is a safe, reliable, and stable standard voltage platform battery module, specifically optimized for portable devices or embedded systems with strict size and weight requirements.
Product Advantage
High Energy Density: Utilizing industry-leading 18650 battery cells, it provides a capacity of up to 3200mAh within a limited volume, resulting in excellent battery life.
Superior Safety: Built-in intelligent protection board (PCB) provides multiple protection functions against overcharging, over-discharging, overcurrent, and short circuits, effectively extending battery life and ensuring safe use.
Ready to Use, Convenient and Worry-Free: Battery cell grouping, welding, protection board installation, and lead terminals (terminal types can be customized according to customer needs) are completed before shipment, eliminating the hassle and risks of self-assembly for users and significantly shortening the product development cycle.
Robust and Stable Structure: Uses a durable insulating casing and bracket for secure cell connection, providing good shock and impact resistance, suitable for various application environments.
Standardized Voltage Platform: The 7.4V nominal voltage is a common standard for many portable electronic devices, ensuring wide compatibility.
Technical Parameters
| Battery Cell Type： | Cylindrical Lithium-ion Battery (18650) |
| Configuration: | 2 Series 1 Parallel (2S1P) |
| Nominal Voltage: | 7.4V |
| Nominal Capacity: | 3200mAh (0.2C discharge) |
| Charging Limit Voltage: | 8.4V ± 0.05V |
| Discharge Cut-off Voltage: | 5.4V (controlled by protection board) |
| Standard Charging Current: | 0.5C (approx. 1600mA) |
| Maximum Charging Current： | 1C (3200mA, recommended) |
| Standard Discharge Current： | 0.5C (approx. 1600mA) |
| Maximum Continuous Discharge Current: | 1C (3200mA, limited by protection board) |
| Product Dimensions (LWH): | Approx. 68mm * 38mm * 19mm (including protection board and wiring) |
| Weight: | Approx. 95g ± 5g |
| Internal Resistance: | ≤ 80mΩ (including protection board and leads) |
| Cycle Life: | ≥ 500 cycles (under standard conditions, capacity retention rate > 80%) |
| Operating Temperature: | Charging: 0°C ~ +45°C / Discharging: -20°C ~ +60°C |
| Storage Temperature: | -20°C ~ +45°C (For long-term storage exceeding one month, it is recommended to store at 50% charge) |
| Protection Functions: | Overcharge, over-discharge, overcurrent, short-circuit protection |
| Wiring Specifications: | Standard wire length 100mm, with terminals (specific model can be negotiated) |
Product Uses
This battery pack is suitable for various devices requiring a compact, lightweight, and rechargeable DC power source. Typical applications include, but are not limited to:
Portable instruments: Handheld scanning devices, detectors, thermometers, laser rangefinders.
Digital audio and video products: Portable speakers, voice recorders, handheld gimbals, camera auxiliary power supplies.
Communication equipment: Walkie-talkies, wireless microphones, 4G/5G module backup power supplies.
Smart hardware and IoT devices: Service robots, smart home controllers, smart locks, trackers.
Medical and health equipment: Portable monitors, massagers, electronic atomizers (must comply with relevant regulations).
Drones and models: Small model aircraft, drone backup power supplies or auxiliary equipment power supplies.
DIY projects and electronics hobbies: Providing a reliable power source for various creative projects.
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Product Precautions
Dedicated Charger: A dedicated charger matching the characteristics of the lithium battery (voltage 8.4V, current recommended ≤1C) must be used. Using a non-lithium battery charger or directly connecting to a power adapter is strictly prohibited, as this may cause fire or explosion.
Avoid Misuse: Do not disassemble, crush, puncture, throw into fire, or immerse the battery pack in water. Avoid using or storing the battery in high temperatures (such as inside a car in direct sunlight) or near open flames.
Prevent Short Circuits: The output terminals (positive and negative) must not be directly connected to each other or connected with a conductor under any circumstances. Use insulating material to wrap the terminals during transportation and storage.
Correct Connection: Before use, please confirm that the device's polarity requirements match the battery pack's output polarity. Reversing the polarity may damage the device or the protection circuit board.
Operating Environment: Please use the battery within the operating temperature range specified in the product specifications. Extreme temperatures will affect performance, capacity, and lifespan.
Disposal: Do not dispose of the battery indiscriminately after its lifespan ends. It should be handled by a qualified waste battery recycling agency in accordance with local environmental regulations.
FAQ
Q1: Can this battery pack directly replace the 7.4V NiMH battery pack in my device?
A: The voltage matches, so theoretically, yes. However, it is crucial that you ensure the original device's charging circuit is designed for lithium batteries (constant current/constant voltage CC/CV mode). If the original device is only designed for NiMH batteries, it is strictly forbidden to use the original charger directly; you must replace it with a corresponding 8.4V lithium battery charger, otherwise, it will pose serious safety hazards.
Q2: Can the battery packs be connected in series or parallel to obtain higher voltage or capacity?
A: We do not recommend users performing series or parallel connections themselves. Each battery pack has a built-in independent protection board, and direct series connection may cause the protection board to malfunction; parallel connection requires highly consistent cell parameters and additional balancing measures. If you need higher specifications, please contact us directly for customization.
Q3: Does a new battery pack require long-term charging to activate it before first use?
A: No. Modern lithium-ion batteries have some charge when they leave the factory and have no memory effect. For first use, simply charge the battery fully with the matching charger (until the indicator light turns green) for normal use.
Q4: How should the battery pack be stored if not used for a long time?
A: It is recommended to store it in a cool, dry environment. If you expect not to use it for more than one month, please charge the battery to approximately 50%-60% of its capacity (voltage approximately 7.6V-7.8V) before storing it, and check and recharge it every 3-6 months.
Q5: How to recover the battery pack after the protection board triggers protection?
A: If it's over-discharge protection, simply connect the matching charger and charge normally to automatically recover. If it's over-current or short-circuit protection, after eliminating external faults (such as a short circuit in the device), disconnecting the load for a period of time or connecting the charger may also restore it. If it fails to recover multiple times, the battery may be damaged; please stop using it.
Q6: Can you provide different wire lengths and terminal types?
A: Yes. The above specifications are standard configurations. We support customizing the wire length, wire specifications (such as AWG number), and terminal types (such as JST, XT60, DuPont connectors, etc.) according to your specific application needs. Please confirm with our sales engineer before ordering. Disclaimer: The specifications and parameters above were obtained under standard testing conditions and may vary slightly depending on specific usage conditions and environment. Please be sure to follow the safety precautions when using this product. Our company is not liable for any damage caused by misuse, modification, or disregard of safety warnings.
