Ridax, a company that sells various iPod Dock Connector accessories, has begun taking pre-orders for its iPhone 3G Charge Converter. The small accessory, the design of which is still being finished, will allow iPhone 3G owners to use older iPod and iPhone charging accessories that are currently incompatible with the 3G to charge the device by converting the power stream to suit the iPhone 3G. It will feature both male and female connectors, as well as a mini USB connector on the side to provide a way to charge the device when connected to a non-charging, Dock Connector-equipped accessory, and will also function as a short Dock extender. Ridax’s iPhone 3G Charge Converter will be available in September for $40; those who want the device sooner can pre-order a $45 “bare” version which will ship in August, followed by the plastic cover which will arrive in September. There is no guarantee that the converter will be safe to use with all accessories, so use caution in ordering.