The KA4 power bank case for 4 18650 batteries — is a practical and reliable solution for creating your own powerful external battery. It allows you to independently assemble a power bank of the required capacity and provide stable charging of smartphones, tablets, headphones, FPV equipment, GPS devices and other electronics. Ideal for both everyday use and backup power.
The case is made of durable ABS plastic, has modern USB, Micro-USB and Type-C interfaces and supports simultaneous charging of multiple devices. This is a great choice for those who want to get maximum autonomy and reliability.
🔋 Main advantages:
- ⚡ 4 slots for 18650 batteries — the ability to assemble a large-capacity power bank
- 🔌 2 USB outputs — simultaneous charging of two devices
- 🔄 Modern Micro-USB and Type-C connectors for convenient charging
- 🛡️ Durable ABS case — durability and reliability
- 📱 Universal use — smartphones, tablets, headphones, electronics
- 🧰 Ideal for DIY projects — creating your own power bank
- 🎒 Compact and lightweight — convenient to take with you
⚙️ Purpose and principle of operation:
The KA4 case is used to create an external battery based on 18650 cells. The installed batteries store energy, and the built-in controller converts the voltage into stable 5V for safe charging of your devices via USB ports.
The controller also provides:
- 🔒 short-circuit protection
- 🌡️ overheating protection
- ⚡ stable output voltage
- 🔋 correct battery charging process
📊 Technical specifications:
| Model | KA4 |
| Quantity batteries | 4 × 18650 |
| Battery type | Li-Ion 18650 |
| Outputs | 2 × USB |
| Inputs | Micro-USB, Type-C |
| Maximum current | 2.1 A |
| Power | 10 W |
| Material | ABS-plastic |
| Color | Black |
🎯 Perfect for:
- 📱 smartphones
- 🎧 wireless headphones
- 📟 GPS and portable devices
- 🚁 FPV and radio electronics
- 🏕️ tourism and travel
- ⚡ backup power
KA4 power bank case from WST store — this is a great opportunity to create a reliable power source with your own hands. Choose quality, autonomy and confidence in any situation!
✅ Order now and create your own powerful power bank!