The PowerPak Xtreme NT120R from NewTrent has a 12000mAh lithium-ion battery, so it has plenty of reserve power to keep your portable charged. (It can recharge phones up to six times.) It has two USB ports, one 5V/1A and one 5V/2A, so you charge phones, most tablets, and most other USB-chargeable devices, like GPS units, handheld game consoles, and MP3 players. The PowerPak Xtreme weighs about 11 ounces and measures 5.2″ x 2.8″ x 1.2″. It has a ruggedized exterior that is drop resistant (handles drops of up to 1 meter) and waterproof (submerged 3 feet for up to 1 hour), which makes it ideal for taking it along when you’re hiking or camping. Most surprising, the PowerPak Xtreme NT120R battery is only 59.95 at New Trent or Amazon (qualifies for Prime shipping).