DON'T BE LEFT WITHOUT BATTERY EVER AGAIN! This device is just like having your own portable pocket generator for your digital devices. IT IS LIKE HAVING AN EXTRA BATTERY CHARGED DURING NATURAL DISASTERS. Portable Backup Battery Charger USB Power Bank FOR MORE THAN JUST YOUR iPHONE, SAMSUNG GALAXY S4. Power Bank Compatible with iPhone 5s, iPad, Samsung galaxy s4 and other USB chargeable devices. EXCELLENT TO HAVE IN YOUR PURSE OR VEHICLE FOR EMERGENCY USE. Use as Battery backup, travel charger or Power Bank External battery Charger RISK-FREE GUARANTEE! You will be 100% satisfied or we'll give you your money back..