Custom 18650 Li-ion Battery Pack 3.7V~14.8V 1S2P 2S2P 3S3P 4S4P Multi-Cell Rechargeable Pack for Power Bank E-bike Power Tool Industrial Equipment | CE UN38.3 | OEM Factory

🔋 18650 Battery Pack 7.4V 2S2P — Rechargeable Li-ion Pack | 3600mAh ~ 6000mAh Custom

Overview

This 7.4V 2S2P lithium-ion battery pack connects two 18650 cells in series and two strings in parallel, delivering stable 7.4V output across a wide capacity range from 3600mAh to 6000mAh (26.64Wh ~ 44.4Wh). Engineered for power tools, robot vacuums, medical portable devices, handheld industrial terminals, and light electric mobility where 7.4V is the standard operating voltage. Integrated BMS with cell balancing, Grade A 18650 cells, and full OEM customization from connector to housing. CE and UN38.3 certified as standard.

2S2P Configuration Explained

String 1: Cell A ──── Cell B  (3.7V + 3.7V = 7.4V / 2000mAh)
                  ║
String 2: Cell C ──── Cell D  (3.7V + 3.7V = 7.4V / 2000mAh)
          Parallel ↓
    Total = 7.4V / 4000mAh = 29.6Wh (std 2000mAh cells)

With 2500mAh cells → 7.4V / 5000mAh = 37Wh
With 3000mAh cells → 7.4V / 6000mAh = 44.4Wh

📌 2S2P advantage: Doubles capacity vs 2S1P while maintaining the same 7.4V — more runtime without changing device voltage requirements.

Multi-Capacity SKU Specifications

⭐ Recommended: 2S2P-5000 offers the best balance of capacity, weight, cycle life, and cost for most OEM applications.

Key Specifications — 2S2P-5000 Standard Model

7.4V 2S Pack Family Comparison

BMS Protection Details

Applications

Charging Guide

🔋 Tip: Always use a 2S balance charger (8.4V) with the JST-XH 3Pin balance connector. This equalizes all 4 cells on every charge cycle — critical for maximizing pack lifespan.

IATA Air Freight Status

✈️ All four SKUs qualify for IATA Section II or IB — standard Class 9 DG with no special quantity limits. No Section IA complications.

Default Package Configuration

OEM / Custom Options

Certification & Compliance

Why Choose Us?

• 🏭 Factory Direct — own 18650 pack assembly lines, zero intermediaries
• 🔋 4-SKU capacity range — 3600~6000mAh all from same production line
• ⚖️ 4-cell BMS balancing — every pack cell-balanced before shipment
• 📐 Flexible housing — PVC wrap to custom ABS hard case from same factory
• 📋 CE + UN38.3 standard — full DG documentation included
• ✈️ All SKUs air-freight eligible — Section II / IB, minimal logistics complexity
• 🔬 10-day OEM sample — any capacity, connector, housing combination
• 🛠️ End-to-end OEM — spec engineering to certified mass production

📩 Tell us your device’s current draw, runtime requirement & housing dimensions — we’ll recommend the optimal 2S2P configuration and quote within 24 hours.