🔋 4S 20A 18650 Lithium Battery BMS Protection Module – 14.8V Li-ion Battery Management System by Ekastore
This 4S BMS (Battery Management System) module is designed for 4-cell (4S) 18650 lithium-ion battery packs. It provides essential protection functions like overcharge, over-discharge, overcurrent, and short circuit protection, making it ideal for DIY battery packs, e-bikes, solar systems, and portable electronics.
✅ Key Features:
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4S Configuration: Manages 4 Li-ion cells in series (~14.8V nominal)
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20A Continuous Discharge Current: Supports high-drain applications
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Built-in Protection Circuits: Overcharge, over-discharge, overcurrent, and short circuit
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Auto Balancing Function: Ensures even charging of all cells
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Compact Design: Easily fits in custom battery pack enclosures
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High-Quality MOSFETs: Efficient thermal and current management
⚙️ Specifications:
| Attribute | Value |
|---|---|
| Battery Type | 18650 Li-ion / LiPo Cells |
| Configuration | 4S (Series – 4 Cells) |
| Nominal Voltage | 14.8V |
| Max Charge Voltage | 16.8V |
| Continuous Discharge | Up to 20A |
| Charge Current | ≤ 5A |
| Overcharge Detection | ~4.25V ±0.05V per cell |
| Over-discharge Detection | ~2.7V ±0.1V per cell |
| Short Circuit Protection | Yes |
| Dimensions | Approx. 50 × 30 × 4 mm |
🛠️ Applications:
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Custom-built lithium battery packs
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E-bikes and scooters
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Solar power storage systems
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RC vehicles and drones
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Power banks and portable tools
📦 Package Includes:
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1× 4S 20A BMS Protection Module for 18650 Li-ion Battery Pack
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