Talk And Charge Simultaneously With This Ultra Slim 2300Mah Emergency Phone Charger. An Excellent Back-Up Power Source For Smartphones And Small Usb Devices, It'S An Easy Way To Charge Essential Electronics On The Move. As Compact As A Credit Card Yet Powerful Enough To Fully Charge A Smartphone In Just 1.5 Hours, Slip This Ultra Slim Power Bank In Your Wallet And Never Run Out Of Battery Life.