When sparks occur on connecting a battery [IF the cables are connected to the proper terminals and in the proper order] is an indication that some of the electricity using devices [clock, computers, etc.] in the vehicle's electrical system are drawing electrical current.
IF the battery cables are being connected properly, this sparking is normal, causes no damage, and is nothing to be concerned about.
Always connect the positive (RED) cable first.
Connect the Positive + battery cable to the positive + battery post first. Then connect the Negative - cable to the negative - battery post.
The man said it Always connect the positive + cable first to the battery. Then connect the negative- cable to the engine somewhere. Never connect the negative cable to the battery itself. Batteries vent hydrogen gas and which can ignite with the slightest spark. For this reason never, ever, connect the negative first and never connect the negative to the battery.
connect the positive first, the negative. the negative cable doesnt spark as much
Connect the positive first and negative last.
connect positive first then negative that is the safe way to do it
red or positive
Something is on drawing power from the battery. Always connect the positive cable first and the negative cable last.
Positive. Always remove the negative cable first and connect the negative cable last.
The battery post positive terminal is where you connect the positive cable. Connect the negative cable to anyplace on the engine or chassis. Connect positive first and remove it last.
The negative cable is removed first, then the positive. To re-connect, the positive goes first, then the negative.
Connect negative (-) black cable first. Then connect positive (+) cable last. You will see a + and a - next to the posts. Hook up positive first, negative last.