3.7V Li-ion batteries are widely used in small electronics and gadgets due to their compact size, high energy density, and rechargeable nature. Below is a detailed overview of 2024 prices for 3.7V Li-ion batteries in Pakistan and their applications in small electronics and gadgets.
1. Price List (2024):
| Battery Type | Capacity (mAh) | Price Range (PKR) |
|---|---|---|
| 18650 | 2000–3500 | 500–1,500 |
| 21700 | 4000–5000 | 1,000–2,000 |
| 26650 | 4500–5500 | 1,500–2,500 |
| LiPo (Lithium Polymer) | 1000–5000 | 300–1,500 |
| Custom Packs | Varies | 5,000–20,000 (depending on configuration) |
Note: Prices may vary based on the seller, brand, and quantity purchased.
2. Use in Small Electronics and Gadgets:
- DIY Battery Packs:
- 18650 and 21700 cells are commonly used to create custom battery packs for drones, power banks, and small robots.
- Example: A 12V battery pack can be made by connecting three 3.7V cells in series.
- Portable Electronics:
- Used in devices like flashlights, portable speakers, and handheld gaming consoles.
- LiPo cells are popular for their lightweight and flexible design.
- Wearable Electronics:
- LiPo cells are ideal for wearable gadgets like smartwatches and fitness trackers due to their compact size and flexibility.
- Medical Devices:
- Used in portable medical devices like glucose meters and pulse oximeters.
- RC Models:
- LiPo cells are commonly used in remote-controlled cars, drones, and airplanes due to their high discharge rates.
- Backup Power for Small Devices:
- Custom battery packs can provide backup power for routers, modems, and other small electronics.
3. Popular 3.7V Li-ion Cell Types:
- 18650 Cells:
- Most commonly used in DIY projects.
- Capacity: 2000mAh–3500mAh.
- Applications: Power banks, flashlights, drones, and custom battery packs.
- 21700 Cells:
- Higher capacity than 18650 cells.
- Capacity: 4000mAh–5000mAh.
- Applications: High-performance drones, EVs, and solar systems.
- 26650 Cells:
- Larger size and higher capacity.
- Capacity: 4500mAh–5500mAh.
- Applications: High-drain devices and custom battery packs.
- LiPo (Lithium Polymer) Cells:
- Lightweight and flexible.
- Capacity: 1000mAh–5000mAh.
- Applications: RC models, portable electronics, and wearable devices.
4. Trusted Brands and Sellers in Pakistan (2024):
- International Brands:
- Panasonic: Known for high-quality 18650 cells.
- Samsung: Offers reliable Li-ion cells for various applications.
- LG Chem: Popular for high-capacity cells used in EVs and solar systems.
- Local Sellers:
- Hall Road (Lahore): A hub for electronics and battery components.
- Daraz (Online): Offers a variety of Li-ion cells from verified sellers.
- AliExpress (Online): A source for affordable cells, but shipping times can be long.
- DIY Communities:
- Online forums and Facebook groups often have members selling or trading Li-ion cells for DIY projects.
5. Tips for Buying 3.7V Li-ion Batteries:
- Check Specifications:
- Verify the voltage, capacity, and discharge rate (C-rating) to ensure compatibility with your project.
- Buy from Trusted Sellers:
- Purchase from reputable sellers or authorized dealers to avoid counterfeit or low-quality cells.
- Inspect for Damage:
- Check for physical damage, such as dents or leaks, before purchasing.
- Test Before Use:
- Use a multimeter to check the voltage and ensure the cell is functional.
- Safety Precautions:
- Use a Battery Management System (BMS) for custom packs to prevent overcharging, over-discharging, and overheating.
- Handle cells carefully to avoid short circuits.
6. Conclusion:
3.7V Li-ion batteries are versatile and widely used in small electronics and gadgets in Pakistan. With prices ranging from PKR 500 to PKR 2,500 per cell (depending on type and capacity), they offer an affordable and efficient solution for custom energy storage needs. By purchasing from trusted sellers and following safety guidelines, DIY enthusiasts and electronics hobbyists can leverage 3.7V Li-ion cells to power innovative projects and devices.