The ASOL 21700 2S4P Battery Pack is a high-capacity lithium-ion pack built on a 2S4P architecture — eight 21700 cylindrical cells (two in series, four in parallel) delivering 7.4V nominal voltage, 20000mAh (20Ah) capacity and 148Wh total energy. With a 10A continuous charge/discharge rating and an integrated BMS, it is engineered as a drop-in OEM power source for portable and backup-power devices that need long runtime in a compact 7.4V platform.
Finished pack dimensions are approximately L141.8 × T44 mm, terminated with a standard XT60 connector (custom connectors, wiring and labeling available). Every unit ships from our quality-controlled facility after individual cell voltage matching, full charge/discharge verification and BMS testing — ready for OEM/ODM integration at low MOQ.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | ASOL-21700-2S4P |
| Chemistry | Lithium-ion (21700 cylindrical cells) |
| Configuration | 2S4P (2 Series, 4 Parallel · 8 cells) |
| Nominal Voltage | 7.4V |
| Charging Voltage | 8.4V |
| Nominal Capacity | 20000mAh (20Ah) |
| Rated Energy | 148Wh |
| Charging Current | 10A |
| Discharge Current | 10A |
| Cell Size | 21700 (21 × 70 mm) |
| Pack Dimensions | L141.8 × T44 mm (excluding wires & connector) |
| Connector | XT60 (custom connectors available) |
| BMS Protection | Overcharge / over-discharge / overcurrent / short circuit / temperature monitoring / cell balancing |
| Charging Temperature | 0°C to +50°C |
| Discharge Temperature | −20°C to +60°C |
| Cycle Life | ≥500 cycles @ 80% capacity retention |
| Certifications | CE, RoHS, UN38.3, MSDS |
| Manufacturer | ASOLENERGY TECHNOLOGY |
Applications
Where the 21700 2S4P is used
Work lights, camping lights & emergency lighting.
Portable speakers, PA systems & amplified audio.
Router & surveillance backup power, small UPS units.
Outdoor cameras & surveillance backup batteries.
Portable medical devices & test instruments.
Small robots, smart & industrial portable devices.
Why ASOL
Factory-direct, fully customizable
Connector, wire gauge, heat-shrink color, custom brand label, BMS & capacity.
Integrated BMS against overcharge, over-discharge, overcurrent & short circuit.
Grade-A 21700 cells, voltage-matched ±10mV for reliable performance.
Custom prototype samples in 5–7 business days before volume production.
Every unit tested for OCV, capacity & protection. Defect rate <0.3%.
UN38.3 Class 9 air & sea · DHL/FedEx/UPS · EXW/FOB/CIF/DDP.
Frequently Asked Questions
What are the key specifications of the ASOL 21700 2S4P battery pack?
It is a 7.4V 20000mAh (20Ah) lithium-ion pack in a 2S4P configuration (eight 21700 cells), with 148Wh energy, 8.4V charging voltage, 10A charge/discharge, an XT60 connector and an integrated BMS. Pack dimensions are approximately L141.8 × T44 mm.
Can I customize the capacity, connector and wiring?
Yes. As the manufacturer, ASOL customizes connector type (XT60, JST, Molex, etc.), wire gauge and length, heat-shrink color, brand labeling, BMS configuration and capacity to match your device. Send us your pinout or sample.
What is the minimum order quantity (MOQ)?
Standard configurations start at 50 pcs; fully custom designs are 100–500 pcs depending on complexity. Sample orders of 1–10 pcs are welcome for evaluation.
What temperature range does it operate in?
It charges at 0°C to +50°C and discharges from −20°C to +60°C, suitable for indoor and outdoor portable equipment.
Is it safe and certified for shipping?
Yes. It uses Grade-A cells with a multi-layer BMS and is CE, RoHS, UN38.3 and MSDS compliant — certified for air and sea transport as Class 9 dangerous goods.
How do I request a quote or sample?
Email info@asolbattery.com or message +86 15779858703 on WhatsApp with your target capacity, connector and quantity. We respond within 24 hours on working days with a factory-direct quote.
Contact
| info@asolbattery.com | |
| +86 157 7985 8703 | |
| Website | www.asolbattery.com |
| Response Time | Within 24 hours on working days |
Sample lead time: 3–5 business days | Bulk production: 10–20 business days
Ready to add the ASOL 21700 2S4P pack to your product line?
Send us your application, target quantity and any custom requirements — we respond within 24 hours with a factory-direct quote and free sample arrangement.
Need a different size or capacity? Explore ASOL’s full cylindrical battery range →
