18650 3S2P Battery Pack 11.1V 6000mAh Rechargeable Li-ion Pack for Laptop Power Tool E-bike Portable Power Station Robot | Custom 4400~7200mAh | CE UN38.3 | OEM Factory

🔋 18650 3S2P Battery Pack — 11.1V Full Capacity Range | 4400mAh ~ 7200mAh Custom Li-ion Pack

Overview

This 18650 3S2P lithium-ion battery pack connects six Grade A 18650 cells in a 3-series 2-parallel configuration, delivering stable 11.1V output across a full capacity range from 4400mAh to 7200mAh (48.84Wh ~ 79.92Wh). The 3S2P architecture is the most versatile mid-voltage cylindrical pack format — widely used in laptops, portable power stations, e-scooters, robotic systems, power tools, and medical portable equipment. Every pack ships with integrated BMS cell balancing, CE and UN38.3 certification, and full OEM customization.

3S2P Architecture

┌──────────────────────────────────────────┐
│  String 1:  [Cell A] ── [Cell B] ── [Cell C]  │  11.1V
│                    ║                          │
│  String 2:  [Cell D] ── [Cell E] ── [Cell F]  │  11.1V
│                Parallel                       │
│  Result: 11.1V / (2 × cell capacity)          │
└──────────────────────────────────────────┘

3S = 3.7V × 3 = 11.1V     ← raises voltage
2P = capacity × 2          ← doubles runtime

Full Capacity Version Matrix

⭐ Best Value: 3S2P-5200 — 2600mAh cells offer the most mature, stable chemistry with best cycle life per dollar in the 18650 lineup.

Full Voltage Reference — All 3S Variants

Detailed Specs — 3S2P-5200 Reference Model

Per-SKU Energy & Runtime Summary

📌 Based on 85% system efficiency. Actual runtime varies by load profile and temperature.

IATA Air Freight Status — All SKUs

✈️ All 7 SKUs qualify for air freight — none exceed the 100Wh Section IB threshold. The 3S2P-5200 sits in the easiest Section II category.

BMS Protection — All SKUs

Applications by SKU

Charging Guide

⚠️ Always use 12.6V / 3S balance charger with JST-XH 4Pin connector for safe charging.

Connector Options

OEM / Custom Options

Why Choose Us?

• 🏭 Factory Direct — own 18650 pack assembly lines, zero intermediaries
• 📦 7 capacity SKUs — 4400mAh to 7200mAh all from same factory
• ✈️ All SKUs air-freight eligible — none exceed 100Wh IATA threshold
• ⚖️ 6-cell BMS balancing — every pack cell-balanced to <5mV delta before shipment
• 🔋 Grade A cells only — 100% capacity verified before assembly
• 📋 CE + UN38.3 standard — full DG documentation included
• 🔬 10-day OEM sample — any capacity, any connector, rapid turnaround
• 🛠️ Full OEM service — spec engineering to certified mass production

📩 Tell us your device voltage, current draw & runtime requirement — we’ll recommend the optimal 3S2P SKU and quote within 24 hours.