Description
🔋 Product Overview
The APKINA 21700 Lithium Battery Cell 3000mAh is a high-performance rechargeable lithium-ion cell designed for power banks, DIY battery packs, electronic projects, backup systems, and portable devices.
Compared to older 18650 cells, the 21700 size offers better current handling, improved efficiency, and longer runtime, making it a popular choice for modern battery packs.
This battery cell is supplied by Rafiq Electronics with proper handling to ensure reliability for professional as well as DIY users.
⚡ Electrical Specifications
🔋 Battery Type: Lithium-Ion (Li-ion)
⚡ Nominal Voltage: 3.7V
🔌 Full Charge Voltage: 4.2V
🔻 Cut-off Voltage: ~2.8V
🔋 Rated Capacity: 3000mAh
Provides stable voltage output suitable for most 3.7V lithium battery applications.
📏 Size & Physical Details
📐 Cell Size: 21700
📏 Diameter: ~21mm
📏 Length: ~70mm
⚖️ Weight: 64 Grams
Standard 21700 dimensions ensure easy fitting in holders and welded battery packs.
🚀 Performance & Efficiency
✅ Higher energy density than 18650 cells
✅ Better heat dissipation
✅ Stable discharge performance
✅ Reliable charging cycles
Ideal for devices that require consistent power delivery.
🔧 Applications & Usage
🔋 Power Bank Battery Packs
🛠️ DIY Electronics Projects
🔌 Backup & Emergency Power Systems
🔋 Portable Devices
⚙️ Custom Battery Pack Assembly
Widely used by technicians, hobbyists, and repair professionals.
🔁 Battery Life & Safety
♻️ Long Cycle Life with proper charging
🛡️ Stable Chemistry for daily use
⚠️ Requires proper BMS protection in battery packs
For best performance, always use a compatible lithium charger and protection circuit.
🧰 Installation & Compatibility
🔧 Suitable for series & parallel battery pack configuration
🔌 Compatible with standard lithium-ion BMS boards
🧲 Can be used with spot welding or battery holders
⚠️ Safety Instructions
⚠️ Do not short circuit terminals
⚠️ Do not over-charge above 4.2V
⚠️ Do not puncture or crush
⚠️ Use only with lithium-ion compatible charger & BMS
Following these guidelines ensures safe and long-term usage.
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