Should A Battery Spark When Connecting. Sparks When Hooking Up Batteries. Then connect simply the second battery no spark will be produced because all capacitors were loaded when the first battery was connected.
Modern cars have lots of things always on and when you connect the wire with things on there will be a spark. Problem if not kept on charger battery tender in approx 6-10 days depending on temp and wether engine catchs on 1st try battery does not have umph enough to start bike for a 2nd or 3rd try. If you dont have the charger plugged in it will make a pretty big spark and a loud snap when connected.
Sep 18 2021 Q.
Use a wire battery-post brush to brush away the neutralized material then flush the area with baking soda. The spark is that capacitor charging. Problem if not kept on charger battery tender in approx 6-10 days depending on temp and wether engine catchs on 1st try battery does not have umph enough to start bike for a 2nd or 3rd try. If you connect the battery cables to the battery and your inverter is connected already to the same battery cablesystem then you will get a strong big spark since the capacitors in the inverter will take a big in-rush power to charge the capacitors inside that inverter.
