The Duracell DU7170 4,000mAh Rechargeable Portable Power Bank is a versatile device that provides convenient and reliable charging for your electronic devices. Here are the key features and details of this product:

**Features:**

- **Capacity:** The power bank has a capacity of 4000mAh, which is sufficient to charge various devices multiple times.

- **Device Compatibility:** It is designed to charge a wide range of devices, including iPhones, Android smartphones, tablets, and more.

- **Fast Charging:** The power bank offers super-fast charging output with a rate of 5V/2.1A through its USB port. This allows for quick charging of devices like iPhones, iPads, Android devices, and others.

- **Device Compatibility:** It is compatible with devices like iPhones, iPads, Android smartphones, tablets, and other USB-powered devices.

- **Compact and Portable:** Its compact size and portable design make it convenient to carry around, ensuring you have a backup power source wherever you go.

- **Charging Speed:** With the high-speed charging capabilities, it can recharge devices rapidly, saving you time.

- **USB Charging:** The power bank can be recharged through any USB port or outlet, making it easy to recharge the power bank itself.

- **Color:** The power bank comes in black, providing a sleek and stylish appearance.

**Charging Capacities:**

- Charges all iPhone models two to three times.

- Can charge a Galaxy S3 twice.

- Can charge an iPad or iPad 2 once.

The Duracell DU7170 power bank is a reliable solution for on-the-go charging needs, ensuring that your devices stay powered up even when you're away from conventional power sources. It's a practical accessory for travelers, commuters, and anyone who needs a quick and efficient way to charge their devices.