
18650 2200mAh Li-ion Rechargeable Battery
The 18650 2200mAh Li-ion Rechargeable Battery is the workhorse cell behind power banks, LED torches, laptop packs, and countless DIY builds. Each cell delivers a nominal 3.7V with a 4.2V full-charge voltage and stores 2200mAh of usable energy in a standard 18x65mm steel can. Rechargeable for hundreds of cycles, it pairs perfectly with TP4056 chargers, boost converter boards, and battery holders in Arduino and ESP32 projects. Robotics builders, flashlight modders, and engineering students in Bangladesh depend on this format for portable power. To buy genuine 18650 cells in Bangladesh, compare the current price in Bangladesh on the Tekko product page before placing your order.
Key Features:
• Nominal voltage 3.7V, fully charged at 4.2V
• 2200mAh capacity for long runtime between charges
• Standard 18650 size: 18mm diameter x 65mm length
• Rechargeable for hundreds of cycles with a proper CC/CV charger
• High energy density in a rugged cylindrical steel case
• Ideal for power banks, torches, robotics and IoT backup power
• Use a protected holder or BMS and never short the terminals
Not sure it will work? Test your circuit free in Tekko Sim — on your phone, in Bangla or English.
| Category | Modules |
| Model no. | BAT-18650-2200MAH |
| Availability | In stock |
| In stock | 2 pcs |
| Delivery | Cash on Delivery, nationwide Bangladesh |
| Cell Model | 18650 Li-ion rechargeable |
| Nominal Voltage | 3.7V |
| Full Charge Voltage | 4.2V |
| Discharge Cut-off | approx 2.5V |
| Capacity | 2200mAh |
| Dimensions | 18mm diameter x 65mm length |
| Weight | approx 45g per cell |
| Cycle Life | approx 300-500 full cycles |
| Charging Method | CC/CV at 4.2V |
| Recommended Charge Current | approx 1A (0.5C) |
| Protection | Bare cell — use a protected holder, BMS or TP4056 board |
| Applications | Power banks, flashlights, RC, robotics, IoT backup |
