The Cuttle Cart (also known as the SuperDuperCharger during development) is an Atari 2600 cartridge developed by Chad Schell.     Similar to the Starpath Supercharger, the Cuttle Cart allows ROM images to be loaded via an 1/8" minijack audio interface such as a cassette tape or CD player.  Production of this cartridge has been discontinued by the manufacturer.
The cartridge is rare and released in limited number; only 204 Cuttle Carts were produced and can be found on occasion at sites such as AtariAge, eBay, and Twin Galaxies. The device is popular amongst homebrew developers and Atari 2600 enthusiasts.
Following the original Cuttle Cart, Schell released the Cuttle Cart 2 for the Atari 7800,   and the Cuttle Cart 3 for the Intellivision console.