This TekNmotion Powermotion 12,000mAh External Portable Battery Pack drops from $74.99 to 59.99 plus free shipping at Meritline when you use coupon code MLCD25YN at checkout. This was the lowest price we found by $5. This back-up can charge three devices at once using two USB ports and a 9 to 12-volt port. This includes smart phones, tablets cameras and more. It also ships with an array of adapters and USB cables. There is no sales tax (except CA).