About this item

🔋 4S 100A BMS – 14.8V Lithium Battery Protection Module

The 4S 100A BMS is a battery management and protection module designed for 4-cell lithium battery packs (4S – nominal 14.8V).
It provides reliable protection against overcharge, over-discharge, short circuits, and overcurrent, ensuring safe and stable operation for high-power applications.

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🛡️ Features & Advantages

• 🔋 Compatible with 4S Li-ion / LiPo batteries (14.8V nominal)
• ⚡ Supports up to 100A current
• 🔒 Full electronic protection system
• 🔄 Cell balancing (depending on version)
• 🧰 Compact and durable design
• 🔌 Easy connection for DIY battery packs

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📦 Technical Description

• 🧩 Type: Battery Management System (BMS)
• 🔋 Configuration: 4S (4 cells in series)
• ⚡ Nominal voltage: 14.8V
• 🔌 Maximum charge voltage: 16.8V
• ⚡ Maximum current: 100A
• 🔥 Overcharge protection: ~4.2V/cell
• 🔻 Over-discharge protection: ~2.5–3.0V/cell
• ⚡ Short-circuit and overcurrent protection: yes
• 📏 Dimensions: vary by model

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🛠️ Applications

• 🔋 DIY lithium battery packs
• 🚲 Electric bikes and scooters
• 🔌 High-power supply systems
• 🤖 Robotics and electronics projects
• ⚡ Energy storage systems

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⚠️ Usage Notes

• ❗ Use only with compatible lithium batteries
• 🔧 Follow proper B+/B-/B1/B2/B3/B4 wiring
• 🛡️ Ensure cooling for high-current operation
• 🔌 Use a suitable 16.8V charger for 4S batteries

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✨ Key Features

• 🔋 High-power 4S BMS
• ⚡ Up to 100A
• 🔒 Full protection system
• 🔄 Cell balancing
• 📦 Ideal for 14.8V lithium packs

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📦 Package Contents

• 1 × 4S 100A BMS Module