system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it recommended to connect the black jumper cable to a bolt on the engine and not the negative post on the dead battery when jumping a car?
gpt
Batteries generate hydrogen gas when the are charging. This can sometimes explode when connecting the battery cable as there are usually sparks. Ideally, connect the positive first, then connect the ground further away from the battery.