Compact Power Systems has expanded its Cellboost line of disposable battery/chargers for cell phones with a new device for the iPod. The compact Cellboost is capable of bringing powerless or near-powerless iPods back to life without any external electricity, battery changes or significant charging time. It can also be used in one charging session or several, and can be thrown away when its power is exhausted. The company said the iPod unit “delivers several hours of additional playback time” and did not provide pricing.