ReVIVE Solar ReStore SL4000 4000Ah Power BankSlim, Compact DesignDon’t worry about any extra bulk with the ReStore SL 4000! This compact but powerful power bank is only 0.4 inches in width and weighs 4.25 ounces. It can easily fit in your pocket, backpack, purse and more for the perfect on-the-go accessory! Simple Charging for Your DeviceUsing the 1.5A USB charging port and your device’s charging cable, get quick, portable power with the SL4000! When plugged into your device, the red indicator light will blink when the SL4000 is getting low on battery. A solid red light indicates that your device is charging. Continuous PowerThe SL4000 only takes 6 hours to charge by USB using the included micro USB cord and 24 hours when in direct sunlight. The red indicator light blinks to indicate its charging and glows a solid red when it has completed charging. NOTE: Charge by USB first; use solar charging as backup power onlyWorks With: V2VaporfiHaloMig CigsApolloSouth Beach SmokeGreen SmokeVapor CoutureNicStickEversmokebluNJOYInnokinKangertechJoyetechand More Electronic Cigarettes with USB Charging!