The ASOL 18650-2S2P 7.4V 4000mAh Li-ion battery pack is designed for OEM projects that need a higher-capacity four-cell cylindrical battery platform with stable voltage, practical energy density and configurable output wiring.
The finished pack size is approximately T21 x W37 x L133mm, so this model is best suited to devices that can accept a longer rectangular 7.4V pack and need more runtime than a two-cell 2S assembly. Connector, wire exit direction, polarity and protection circuit settings can be adjusted for production projects.
Technical Specifications
| Parameter | Value |
|---|---|
| Battery Model | 18650-2S2P |
| Cell Size | T18 x L65mm |
| Finished Product Dimensions | T21 x W37 x L133mm |
| Nominal Capacity | 4000mAh |
| Nominal Voltage | 7.4V |
| Charging Voltage | 8.4V |
| Charging Current | 2A |
| Discharge Current | 6A |
| Charging Temperature | 0-45°C |
| Discharge Temperature | -20-60°C |
| Customization | Connector, wire length, polarity, PCM/BMS, label and packaging options |
Product Advantages
Longer-runtime 7.4V pack in a 2S2P format
Two cells in series set the 7.4V platform, while the parallel pair increases capacity and runtime.
29.6Wh energy reserve supports portable equipment that needs longer service time between charges.
T21 x W37 x L133mm dimensions suit slim compartments where cells are arranged lengthwise.
PCM/BMS limits, harness length, connector polarity and label details can be confirmed before samples.
Applications
Common equipment using 18650-2S2P packs
Longer runtime power for portable LED and work-light products.
Compact pack option for payment terminals, label printers and mobile office devices.
Custom wiring and protection options for compact medical equipment projects.
Useful for RC products that need a 2S2P Li-ion battery platform and custom connector.
Supports compact backup power designs with custom connector and PCM options.
Suitable for small cleaning devices that need 7.4V output and custom battery packaging.
Electrical And Mechanical Notes
This 2S2P pack follows a standard two-series Li-ion charging profile. The recommended charging voltage is 8.4V, with 2A charging current and 6A discharge current. Operating temperature range is 0-45°C for charging and -20-60°C for discharge.
Because the pack is longer than a 2S1P assembly, please confirm the available battery bay length, cable outlet position and connector clearance before sample production. ASOL can then match the PCM/BMS protection limits, harness direction, connector model, sleeve material and label information to the device drawing or physical sample.
Customization Options
- Connector matching for JST, Molex, DC plug, bare wire or customer-specified terminals.
- Wire length, polarity, cable exit direction, insulation sleeve and label customization.
- PCM/BMS selection for over-charge, over-discharge, over-current and short-circuit protection.
- Outer wrapping, barcode label, warning label and customer part-number label support.
- Sample confirmation before bulk production for fit, runtime and charging compatibility.
Ordering Information
To quote this 7.4V 4000mAh 18650-2S2P pack accurately, please send the required quantity, target battery-space dimensions, connector photo or model, wire length, polarity, normal working current, peak current and charging method. For replacement projects, photos of the original battery label and installation direction help us confirm whether the longer 2S2P layout is suitable.
Frequently Asked Questions
Can this 18650-2S2P pack replace a smaller 2S pack?
Only if the device has enough space for the longer T21 x W37 x L133mm pack and the 6A discharge rating matches the load. Please share the original battery size, connector and working current before replacement.
Is this battery pack suitable for 8.4V chargers?
Yes. This is a 2S2P Li-ion battery pack with 7.4V nominal voltage and 8.4V full-charge voltage. The charger must be designed for 2S lithium-ion batteries.
What information is needed before making a sample?
Please provide the battery bay size, connector or terminal type, wire length, polarity, charge method, continuous load current, peak current and expected quantity. This helps confirm the cell layout and protection circuit.
Is this model mainly for longer runtime?
Yes. The 2S2P layout increases capacity compared with a 2S1P pack while keeping the same 7.4V voltage platform. It is intended for moderate-load equipment that benefits from longer runtime.
What information is needed for quotation?
Please send target quantity, application, working current, connector type, wire length, battery compartment size, label requirement and any certification or shipping documentation needs.
Contact
| info@asolbattery.com | |
| +86 157 7985 8703 | |
| Website | www.asolbattery.com |
| Response Time | Within 24 hours on working days |
Sample lead time: 3-7 business days after details are confirmed
Bulk production: 10-20 business days depending on order quantity and material readiness
Need a 7.4V pack with more runtime?
Send the available battery space, connector direction, load current and quantity. ASOL can review whether this 18650-2S2P layout fits your product or recommend another 7.4V cylindrical pack.
Need another cylindrical pack? Explore ASOL cylindrical battery pack options or send your project details for a custom recommendation.
