Romoss Direct via Amazon offers the Romoss 5,000mAh Portable Charger with Switch-tip Charging Cable for $14.99. Coupon code "X7MHX5XX" cuts that to $11.99. Plus, Prime members bag free shipping. (Non-members can spend $35 to bag free shipping; otherwise, shipping costs $6.02.) That's $38 off and the lowest total price we could find. It features Lightning connectors and a microUSB input.