Ready, aim, campfire!This week's roundup of new accessories for your iOS gear includes a device that uses your campfire to power up your iPhone, plus the usual assortment of speakers, keyboards, stands, and more.The Art of PowerThe $99 \nTower is both an iPad stand and charging station. Just plug it in wherever\u2019s convenient, and it\u2019ll juice your tablet up while displaying it at eye level. The desk-height Tower features four AC outlets and two USB ports, and it offers surge protection.GriffinBluetooth isn\u2019t everything. The $60 \nWired Keyboard for iPad plugs directly into your tablet and lets you go to work without the hassle of setting up wireless connections. It includes a one-meter cable and draws power from the iPad.KanexThe $50 \nGoPower Pack features a 6,000-mAh battery that can power your iPhone twice over. It also features \u201c an innovative slide-out stand that props up your phone so you can watch a movie while charging.\u201d An 11,000-mAh model is also available.PhotojojoThe new $99 \nPhotojojo lens set features a batch of pro-level lenses\u2014fisheye, super fisheye, polarizer, macro, and wide-angle\u2014for your iPhone, each \u201ccrafted out of solid aluminum and outfitted with thick, high-clarity glass.\u201dPhotojojoThe $149 \nPower Pot is an iPhone accessory to bring when you go camping. Like an old steam engine, the device transforms fire into energy\u2014but this one can keep your phone charged even when you\u2019re far, far away from an electrical outlet.SupermechanicalThe $70 \napp-powered Range cooking thermometer helps you be your best chef: Just plunge the thermometer into the meat and it transmits temperature data to your phone. When the dish hits the right temperature, remove it from the oven and serve!Tivoli AudioThe $299 Music System Three from \nTivoli Audio is a Bluetooth speaker system that includes an AM\/FM radio complete with five station presets. The system has two three-inch drivers and a clock, and is optionally available with Walnut, Cherry, or Black Ash veneers. The system goes on sale in the late summer.Twelve SouthThe $100 \nHoverBar 3 is \u201ca flexible arm that attaches to any ledge in your office, kitchen, bedroom or anywhere you use your iPad.\u201d The bar is 22 inches in length and the clamp that holds the tablet fits every iPad from the second generation on.