The stickers use typical watch batteries, which last about a year. This project also turned to crowdfunding to get started. Through Jan. 14, you can back the project at Indiegogo and buy stickers for as little as $15 each. Afterward, it'll cost you about $20 a sticker at sticknfind.com. iMpulse Another crowdfunding success is the iMpulse Controller, which targets mobile gamers who happen to misplace their keys. Really, though, the key-fob device is intended to be used as a remote control for games on a smartphone. It's for the person who misses that tactile response of pushing a button. Besides serving as a portable Bluetooth joystick, iMpulse also turns into a key finder and a camera-phone remote so you don't have to set a timer. Early backers of the Kickstarter project got a chance to buy an iMpulse for $25 and creators are opening up pre-orders at impulsecontroller.com/storefront.php for the same price, plus shipping and handling. When the product becomes widely available, which could be as soon as the second quarter of 2013, the company expects retail prices to be around $40. BiKN The BiKN, pronounced beacon, mashes mobile app and two pieces of hardware with a heavy dose of Apple ( AAPL)-influenced design. BiKN, introduced earlier this year, uses the lesser-known 802.15.4 wireless technology, which isn't built into iPhones, hence a special case is required. It also requires "tags," which look like key fobs and must be attached to every item you don't want to lose. A benefit of the 2-piece hardware setup is that the BiKN phone case comes with its own battery so it doesn't run down the phone's. The tags, meanwhile, can be recharged over USB. A starter kit comes with two tags and an iPhone case for $130 at bikn.com. MicroTrax Putting a label on your keychain can help with its recovery. But it's not wise to attach your home address to a keychain with your house and car keys. Third party services, like BoomerangIt and StuffBak provide tags with ID numbers and act as the go between for losers and finders.