Ontrion Brands via Amazon offers Prime members the LifeCHARGE JuicyBar MFI 2,600mAh USB Power Bank, model no. ONT-PWR-35393, for $19.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.38.) This MFi-certified pocket-size charger features built-in Lightning and microUSB connectors. Deal ends May 22.