📝 Overview
The 3.7V 4000mAh Li-Po Rechargeable Battery is a lightweight, high-capacity lithium polymer battery designed to provide reliable power for portable electronics, robotics, IoT devices, drones, and DIY projects. With an energy capacity of 14.8Wh, it offers long operating time while maintaining a compact and slim form factor.
⚙️ Key Features
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High-capacity 4000mAh lithium polymer battery
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Nominal voltage: 3.7V
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Energy capacity: 14.8Wh
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Lightweight and compact design
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Rechargeable with low self-discharge
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Stable power output
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Suitable for portable electronic devices and embedded projects
📦 Technical Specifications
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| Battery Type | Lithium Polymer (Li-Po) |
| Nominal Voltage | 3.7V |
| Capacity | 4000mAh |
| Energy | 14.8Wh |
| Maximum Charge Voltage | 4.2V |
| Recommended Cut-off Voltage | 3.0V |
| Dimensions | Approx. 52 × 107 mm (model dependent) |
| Rechargeable | Yes |
🛠️ Applications
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Arduino and ESP32 projects
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Robotics
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IoT devices
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Portable electronics
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GPS trackers
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DIY battery-powered projects
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Emergency backup power
⚠️ Safety Notes
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Use only a Li-Po compatible charger with a 4.2V charging profile.
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Do not overcharge, over-discharge, puncture, or expose the battery to excessive heat.
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For battery packs, use an appropriate Battery Management System (BMS) or protection circuit.