Original JOINSUN INR21700 4500mAh A Grade 3.7V Li-Ion Rechargeable Battery

Description

Original JOINSUN INR21700 4500mAh A Grade 3.7V Li-Ion Rechargeable Battery

Specification:
Product Name: JOINSUN
Battery Type: Li-ion Rechargeable Cell
Grade: Original A
Nominal Voltage: 3.7V
Full Charge Voltage: 4.2V
Nominal Capacity: 4500mAh
Energy: 16.2Wh
Rechargeable: Yes
Battery Chemistry: Lithium-ion (Li-ion)
Cell Size: 21700 (21 × 70 mm)
Diameter: Approx. 21 mm
Length: Approx. 70 mm
Positive Terminal: Flat Top
Standard Charging Method: CC/CV
Recommended Charging Voltage: 4.2V
Discharge Cut-off Voltage: 2.75V
Operating Temperature (Charge): 0°C to 45°C
Operating Temperature (Discharge): -20°C to 60°C

Features

🔋 Original A Grade Li-ion Cell – High-quality Original A Grade lithium-ion cell, যা stable performance এবং reliable backup প্রদান করে।

⚡ 4500mAh Real Capacity – 4500mAh capacity থাকায় বিভিন্ন portable electronic devices-এর জন্য উপযুক্ত।

🔋 3.7V Nominal Voltage – Standard 3.7V Li-ion output, fully charged অবস্থায় 4.2V পর্যন্ত পৌঁছায়।

♻️ Rechargeable Battery – শত শত charge-discharge cycle সাপোর্ট করে, ফলে দীর্ঘদিন ব্যবহার করা যায়।

🔄 Low Self-Discharge – দীর্ঘ সময় সংরক্ষণ করলেও charge তুলনামূলকভাবে ভালো ধরে রাখে।

⚙️ Flat Top Design – Flat-top terminal হওয়ায় battery holder এবং DIY battery pack-এর জন্য উপযোগী।

🛡️ Stable Performance – Consistent voltage output প্রদান করে, যা বিভিন্ন electronic projects-এর জন্য নির্ভরযোগ্য।

🔌 CC/CV Charging Compatible – Standard 4.2V Li-ion charger দিয়ে নিরাপদে চার্জ করা যায়।

🧰 Suitable for DIY Battery Packs – Spot welding-এর মাধ্যমে custom battery pack তৈরিতে ব্যবহার করা যায়।

💡 Lightweight & Compact – 18650 standard size হওয়ায় বহন ও ইনস্টল করা সহজ।

Applications

🔦 Rechargeable LED Flashlights

💡 Emergency Lights & Rechargeable Lamps

🔋 DIY INR21700 Battery Pack Assembly

🔌 Portable Power Banks

🤖 Robotics & Automation Projects

📡 IoT, Arduino & ESP32 Power Projects

🚲 Electric Bicycle (E-Bike) Battery Pack (Low Power Applications)

🛴 Electric Scooter Battery Pack (Low Power Applications)

☀️ Solar Energy Storage Projects

⚡ UPS & DC Backup Systems

🎮 Portable Gaming Devices

📷 Digital Cameras & Camera Accessories (Compatible Devices)

🔊 Bluetooth Speakers

📻 Portable Radio & Audio Devices

🧪 Electronics Lab & Educational Projects

🔧 Battery Replacement for Compatible Devices

🏕️ Camping Lights & Outdoor Power Solutions

📦 Custom Lithium Battery Pack Manufacturing

⚠️ Important Notes
🔌 Use only with a compatible 3.7V Li-ion charger (4.2V CC/CV charging).
🛡️ For battery pack applications, always use a suitable BMS (Battery Management System).
🔥 Avoid short-circuit, overcharging, puncturing, or exposing the battery to high temperatures.
⚡ This battery is recommended for low to medium current applications unless the manufacturer specifies a higher discharge rating.

Package Includes:
1 × INR21700 Rechargeable Battery