OLALA Y1 Power Bank 3000mAh Portable Cell phone Mobile External Battery Charger Ultra Slim Elegant Design for Smart Phones Tablets and Other Mobile Devices - White 1. Elegant design: This Y1-3000mAh Power Bank has elegant design which will be a good helper in your daily tech life. 2. Ultrathin: As slim as 8.5mm and only weighs 73g, light and portable features enable you to carry it more convenient. 3. Safer Casing Material: Encased in ABS+PC Material Housing. 4. Conversion Rate:Above 85%. 5. Compatibility: Compatible with 99% Digital Devices, widely compatible with Apple, Samsung, HTC Smart Phones and other 5V input devices.