Expertpower 7800mah Power Bank/Portable Charger for Smartphones & Tablets//Android & Apple Compatible Add 200% more battery life to your smartphone with this high capacity 78000mAh portable phone charger. This is equal to 20 hours of extra talk time or 2 full charges for when you need it most. Made With High Quality Li-Polymer Cells, ExpertPower Gives You Quality You Can Trust