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APTPES manufactures this 7.4V 3200mAh (0.2C discharge) lithium battery pack for Bluetooth speakers and related industrial applications. The lithium-ion cell platform in 2 Series 1 Parallel (2S1P) arrangement ensures stable voltage output and consistent discharge characteristics. Each unit undergoes capacity grading, protection board calibration, and full electrical testing before shipment. Certifications include CE, RoHS, UN38.3, and MSDS for global shipping compliance. Get a quote for OEM and wholesale orders.
Integrated Multi-Protection Circuit: The built-in protection IC monitors 7.4V cell voltage in real time, guarding against overcharge, over-discharge, overcurrent, and short circuits. This prevents catastrophic cell failure during abnormal operating conditions.
Precision Cell Matching: Each lithium-ion cell undergoes capacity grading and internal resistance sorting before assembly into the 2 Series 1 Parallel (2S1P) configuration. This matching process ensures uniform charge and discharge across all cells, extending pack lifespan and maintaining voltage stability.
Factory-Tested Quality Assurance: Every battery pack completes a full electrical testing cycle at our Dongguan facility, including charge retention verification, protection board trigger validation, and dimensional inspection. Test reports accompany each batch shipment for OEM traceability.
Global Certification Compliance: Manufactured to meet CE, RoHS, UN38.3, and MSDS documentation requirements. These certifications enable duty-free import into EU markets and compliant air freight for international distribution channels.
OEM Customization Support: Wire length, terminal connector model, cell capacity, and protection board parameters can be modified to match proprietary hardware specifications. Our engineering team provides DFM review and prototype sampling within 7-10 business days.
Rigorous Safety Standards: Manufactured under ISO-compliant processes with full material traceability. The lithium-ion cells meet UN38.3 transportation testing requirements including altitude simulation, thermal cycling, vibration, and impact testing.
Optimized for Volume Production: Tiered pricing structures reward volume procurement with flexible MOQ arrangements. Standardized lithium-ion cell sourcing and automated assembly lines ensure consistent lead times for recurring production orders.
| 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) |
Targeted at Bluetooth speakers applications, this battery pack addresses the power requirements of portable audio systems and wireless sound devices. The 7.4V nominal voltage matches standard device input specifications in these categories, eliminating the need for voltage regulation circuitry in compatible designs. Procurement teams sourcing for Bluetooth speakers programs can request application-specific test data from our engineering department.
A: Standard warranty covers manufacturing defects for 12 months from shipment date. This includes cell capacity degradation below 80% of rated capacity under normal use conditions. Warranty does not cover damage from improper charging, physical impact, or operation outside specified temperature ranges.
A: Yes. All packs are UN38.3 certified and shipped with proper dangerous goods documentation (IATA/IMDG compliant). Packs are packaged in UN-rated boxes with insulation and short-circuit protection. Our logistics team handles DG declaration paperwork for international air and sea freight.
A: Use a dedicated lithium-ion charger matching the 7.4V nominal voltage with CC/CV charging algorithm. Do not use unregulated power supplies.
A: The integrated protection IC continuously monitors cell voltage and current flow. It disconnects the circuit when voltage drops below the safe threshold (over-discharge protection) or exceeds the charge limit (overcharge protection). The board also triggers on overcurrent events to prevent cell damage from short circuits.
A: Direct parallel connection of finished battery packs is not recommended. Even identical models from the same batch may have slight voltage and internal resistance differences that cause circulating currents. For applications requiring higher capacity, contact our engineering team to order factory-balanced multi-parallel packs with matched cells.
As a direct manufacturer, APTPES provides this 7.4V 3200mAh (0.2C discharge) battery pack with full material traceability, batch test reports, and regulatory documentation. OEM services include private-label packaging, custom wire harness assembly, protection IC programming, and cell selection optimization. We maintain raw material inventory for recurring production orders and offer VMI (vendor-managed inventory) programs for high-volume customers. Submit your specification sheet for a detailed quotation within 24 hours.
Share the voltage, capacity, dimensions and quantity you need. Our engineers reply with a tailored OEM/ODM quotation within 24 hours.