The 2016 Atari Flashback Portable is great, it has a rechargeable battery, an AV out port, many built-in games, and an SD card slot for adding even more games! All for about $50. It's generated a lot of enthusiasm, as well as many questions.
Does the Atari Flashback Portable have a cartridge slot?
No, it has a slot for an SD card, which is better. SD cards are smaller, cheaper, and can hold more information.
What cards are compatible?
Most name-brand SD cards, 8GB or smaller in size,