Black 4500mAh Portable USB External Rechargeable Backup Battery Power Bank Charger Case with Viewing Stand for Sony XPERIA Z2 1. Capacity: 4500mah. 2. Compatible Perfect with new Sony Xperia Z2. 3. Works as both an extended battery set and a protection case. 4. External battery charger case for Sony Xperia Z2 Could stand up. 5. Package includes: 1 x Backup Battery.