A: I use it to charge a 12V auto battery, but the product manual states: "The product is only compatible with 6V & 12-volt Lead-Acid, AGM, and Lithium batteries." It is a 5 amp charger on 12V batteries. So if your battery is one of the above 3 types, I would say it should work.
A: The Noco Genius 2 has a spring clip which is attached to the wiring via a terminal ring. They use a hex key to attach the terminal ring to the spring clip. So you can remove the wiring from the spring clips and you would be left with a terminal ring on the end of the wire. However, these terminal rings are a smaller diameter (guessing maybe close to a 1/4 inch). They do sell a separate terminal ring cable that has larger eyelets.
A: Yes, they are integrated into the clamps and can be accessed with an Allen wrench
A: Yes. Connect the GENIUS2 to your battery, select the correct charging mode, and the GENIUS2 will charge and then automatically maintain the battery as long as it is connected to the battery and to A/C power.
A: It’s not a jump starter (although NOCO sells those too). It’s a charger. Will take a couple days to charge battery back to a usable level if it is completely dead: https://m.youtube.com/watch?v=EvGaGa-Ccf0
A: The GENIUS2 is a battery charger that recharges a battery only when plugged into an A/C outlet. It is not a portable jump starter. For this type of product, see NOCO Boost UltraSafe Lithium Jump Starters.