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“18650 3.7V Battery Pack Custom 1S~4S 2P~6P 7.4V 11.1V 14.8V Rechargeable Li-ion Pack for Power Tool Laptop E-bike Robot Power Station | OEM ODM Factory Direct” has been added to your cart. View cart
18650 3S2P Battery Pack 11.1V 4500mAh Rechargeable Li-ion Pack
$35.00
Rechargeable 11.1V 4500mAh 18650 Li-ion battery pack (3S2P configuration) with built-in BMS protection for portable devices and power tools. Custom OEM available.
π 18650 3S2P Battery Pack β 11.1V 4500mAh Rechargeable Li-ion Pack
Overview
This 18650 3S2P lithium-ion battery pack connects six Grade A 18650 cells β three in series, two in parallel β delivering stable 11.1V / 4500mAh (49.95Wh). The 4500mAh capacity makes it a strong mid-range option between the standard 5200mAh (2600mAh/cell) and budget 4400mAh (2200mAh/cell) configurations β offering excellent runtime, competitive weight, and strong cycle performance. Ideal for laptops, portable power stations, power tools, medical devices, and industrial robots. CE and UN38.3 certified, in stock, full OEM customization available.
3S2P Architecture
ββββββββββββββββββββββββββββββββββββββββββββ
β String 1: [A1] ββ [A2] ββ [A3] = 11.1V β
β β β
β String 2: [B1] ββ [B2] ββ [B3] = 11.1V β
β β Parallel β β
β Total: 11.1V / 4500mAh = 49.95Wh β
β 6 cells total β
ββββββββββββββββββββββββββββββββββββββββββββ
3S = 3.7V Γ 3 = 11.1V
2P = 2250mAh Γ 2 = 4500mAhKey Specifications
| Parameter | Specification |
|---|---|
| Configuration | 3S2P |
| Total Cells | 6Γ Grade A 18650 |
| Cell Capacity | 2250mAh / cell |
| Nominal Voltage | 11.1V |
| Fully Charged | 12.6V |
| Capacity | 4500mAh |
| Energy | 49.95Wh |
| Internal Resistance | β€ 180mΞ© (pack) |
| Weight | β 270g |
| Recommended Charge | 0.5C = 2.25A CC/CV |
| Max Charge Current | 4.5A (1C) |
| Continuous Discharge | 9.0A (2C) |
| Peak Discharge | 18.0A (4C) |
| Discharge Cut-off | 9.0V (3.0V/cell) |
| Self-discharge Rate | β€ 2% / month |
| Cycle Life | β₯ 500 cycles |
| Capacity Retention | β₯ 80% at 500 cycles |
| Operating Temp | -20Β°C ~ 60Β°C |
| Storage Temp | -10Β°C ~ 25Β°C |
| Storage Voltage | 11.4V (3.8V/cell) |
| Balance Connector | JST-XH 4Pin (3S) |
| Discharge Connector | XT60 / DC Jack / custom |
| Wire Gauge | AWG18 |
| Wire Length | 150mm |
| Certification | CE / UN38.3 / RoHS |
Full Voltage Reference
| State | Voltage | Note |
|---|---|---|
| Fully charged | 12.6V | 4.2V Γ 3 |
| Nominal | 11.1V | Standard rating |
| Storage | 11.4V | 3.8V/cell β optimal |
| Low warning | 9.9V | 3.3V/cell β recharge |
| BMS cutoff | 9.0V | 3.0V/cell β hard stop |
| Overcharge cutoff | 12.75V | 4.25V/cell β BMS |
3S2P Full Capacity Comparison
| SKU | Cell | Voltage | Capacity | Energy | Weight | Grade |
|---|---|---|---|---|---|---|
| 3S2P-4400 | 2200mAh | 11.1V | 4400mAh | 48.84Wh | β265g | Standard |
| 3S2P-4500 β | 2250mAh | 11.1V | 4500mAh | 49.95Wh | β270g | Mid-grade |
| 3S2P-4800 | 2400mAh | 11.1V | 4800mAh | 53.28Wh | β285g | Standard |
| 3S2P-5200 | 2600mAh | 11.1V | 5200mAh | 57.72Wh | β305g | Grade A |
| 3S2P-6000 | 3000mAh | 11.1V | 6000mAh | 66.6Wh | β330g | High Grade |
| 3S2P-7200 | 3600mAh | 11.1V | 7200mAh | 79.92Wh | β375g | Premium |
β 4500mAh positioning: Sits between budget 4400mAh and standard 5200mAh β ideal when cost efficiency is prioritized over maximum capacity.
3S2P-4500 vs Nearby SKUs
| Metric | 3S2P-4400 | 3S2P-4500 | 3S2P-5200 |
|---|---|---|---|
| Cell capacity | 2200mAh | 2250mAh | 2600mAh |
| Energy | 48.84Wh | 49.95Wh | 57.72Wh |
| Weight | β265g | β270g | β305g |
| Cost index | Budget | Mid | Standard |
| Cycle life | β₯500 | β₯500 | β₯500 |
| Best for | Cost-sensitive | Balanced | Performance |
Runtime Estimation
| Device | Power Draw | Runtime |
|---|---|---|
| Laptop (light use) | 25W | β 1.7 hours |
| Laptop (full load) | 45W | β 57 min |
| Portable power station | 80W | β 38 min |
| Cordless power tool | 60W | β 51 min |
| Medical handheld | 15W | β 2.8 hours |
| Industrial robot arm | 40W | β 1.5 hours |
| Handheld terminal | 10W | β 4.2 hours |
| UPS backup | 20W | β 2.1 hours |
π Based on 49.95Wh at 85% efficiency.
BMS Protection β 6-Cell System
| Protection | Threshold | Function |
|---|---|---|
| β‘ Overcharge/cell | 4.25V cutoff | Prevents thermal runaway |
| π Over-discharge/cell | 2.75V cutoff | Preserves cycle life |
| βοΈ Cell balancing | Auto on charge | Equalizes all 6 cells |
| π₯ Overcurrent | >18A trip | Protects tool & robot circuits |
| β οΈ Short-circuit | Instant cutoff | User & device safety |
| π‘οΈ Over-temperature | 65Β°C cutoff | Thermal protection |
| π Auto-recovery | After fault cleared | Field-friendly |
Applications
| Industry | Typical Devices |
|---|---|
| π» Laptops | 10.8V~11.1V laptop replacement packs |
| π§ Power Tools | Cordless drills, grinders, sanders |
| β‘ Portable Power | Mid-size power stations, backup packs |
| π€ Robotics | Light robot arms, educational platforms |
| π₯ Medical | Portable monitors, handheld diagnostics |
| π Industrial | AGV carts, mobile terminals, field instruments |
| π‘ UPS & Backup | Server UPS, emergency lighting |
| π΅ E-mobility | Low-power e-scooters, electric wheelchairs |
βοΈ IATA Air Freight Status
| Parameter | Value |
|---|---|
| Energy | 49.95Wh |
| IATA Category | Section II |
| Air status | β Minimal restrictions |
| Quantity limit | No limit per package |
βοΈ At 49.95Wh, this pack qualifies as IATA Section II β the most logistics-friendly category for lithium battery packs. Lowest DG shipping cost and documentation requirements.
Charging Guide
| Mode | Current | Time | Notes |
|---|---|---|---|
| 0.5C Standard | 2.25A | β 2h | β Best cycle life |
| 1C Normal | 4.5A | β 65min | β Daily use |
| 2C Fast | 9.0A | β 32min | β οΈ Occasional only |
| Storage mode | 2.25A β 11.4V | β | β >3 days storage |
β οΈ Use 12.6V / 3S balance charger with JST-XH 4Pin connector only.
Default Package Configuration
| Item | Specification |
|---|---|
| Pack | 18650 3S2P 11.1V 4500mAh |
| Cells | 6Γ Grade A 18650 2250mAh |
| BMS | β 6-cell balancing + full protection |
| Discharge connector | XT60 / DC Jack (select) |
| Balance connector | JST-XH 4Pin (3S) |
| Wire gauge | AWG18 |
| Wire length | 150mm |
| Housing | PVC wrap / ABS case (select) |
| Label | Standard / OEM white-label |
| Stock | β In stock |
OEM / Custom Options
| Option | Details |
|---|---|
| Capacity | 4400 / 4500 / 4800 / 5200 / 6000 / 7200mAh |
| Configuration | 3S1P / 3S2P / 3S3P / 3S4P |
| Connector | XT60 / DC Jack / Anderson / bare wire |
| Balance lead | JST-XH 4Pin (3S) standard |
| Wire length & gauge | 100~300mm / AWG14~AWG20 |
| BMS | Standard / Smart BMS with fuel gauge |
| Housing | PVC wrap / ABS hard case / custom |
| Certification | CE, UN38.3, RoHS, UL1642, IEC62133 |
| Branding | OEM / white-label labeling |
| MOQ | 20 pcs |
Certification & Compliance
| Certificate | Scope | Status |
|---|---|---|
| β CE | EU market | Standard |
| β UN38.3 | Global freight | Standard |
| β RoHS | Substance compliance | Standard |
| β MSDS | Safety data sheet | Standard |
| π IEC 62133 | Battery safety | On request |
| π UL 1642 | US market | On request |
Why Choose Us?
- π Factory Direct β own 18650 pack assembly, zero intermediaries
- βοΈ Section II air freight β 49.95Wh, lowest DG logistics complexity
- βοΈ 6-cell BMS balancing β every pack balanced before shipment
- π Grade A cells β 100% capacity verified before assembly
- π CE + UN38.3 standard β full documentation included
- π¬ 7-day OEM sample β any capacity, any connector
- π οΈ Full OEM service β spec to certified mass production
π© Need 11.1V pack? Tell us your device current draw and runtime requirement β optimal 3S configuration quoted within 24 hours.
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