Appu, as
@Mythos alluded to, a charged battery is at 12.8 volts, not 12 volts. 12 volts is dead. Do you have a charger? A battery takes 24 hours+ to charge from 12 volts.
Yes that is right, despite the ubiquitous rumors there is no difference in spark creation with regards to the order of connection. Completing the circuit will spark, using any order. That is simply electricity for you.
The creation of hydrogen during battery charging is the initiative for spark prevention. But notice when jump starting (not a bike, NEVER A BIKE PEOPLE) the recommendation is using the dead car's frame as far from the battery as possible, because a spark will inevitably be created, so we create it far from the hydrogen gas rather than using the closer battery negative terminal.
Gasoline can ignite from a spark but it it supposed to be fully contained in the first place. But also it really requires a high voltage or massive spark. When we see gas pumps go up in flames from people brushing against their seats and touching the pump handle, that is 10-20000 volts of static, creating a very long spark. I do not know the exact reasoning but can assume that the surface area of that spark is a big deal, perhaps combined with the huge voltage potential, compared to a micro-spark generated by connecting a 12V battery. Of course I have no interest in doing personal proof with a pan of exposed gasoline...
Shorting is the significant issue above and beyond the spark that the connection inherently creates. Your procedure that you know because you are a professional accomplishes this: Connect the positive. Now create the accident. Drop a wrench from battery + to frame.
Nothing happens because the electricity stored in the battery does not yet have a path. It cannot return from the + to the - battery terminal
Now connect the battery incorrectly. Connect the negative first. Create the accident and OOPS drop a wrench from battery + to the frame. The - terminal is connected to the frame so this act completes the circuit and allows the battery's 260 amps to weld the wrench to the vehicle, melting or blowing up the battery, or killing the person who is still holding the wrench.
The smart electronics detected that the battery is still charged and so it goes immediately to float mode. I am a bit astounded at how long these motorsports batteries stay at full. In cool weather, for several weeks! Maybe it is because the motorcycle is not using power when off like the stupid cars are doing nowadays. Or maybe the motorsport batteries really have some nifty tech and are built for the condition of not using boats and motorcycles often. You tell me.
