Operation CHARM: Car repair manuals for everyone.

Battery Precautions

CAUTION:
- Never use a booster/starter with a voltage rating above 12 volts to start engine.
- Be sure the battery is properly connected--prior to starting engine.
- Do not disconnect battery when engine is running.
- Disconnect battery cables prior to charging battery.
- Avoid creating sparks near battery--automotive batteries contain sulfuric acid and produce explosive hydrogen gas.