Operation CHARM: Car repair manuals for everyone.

Battery Precautions

1. Never use a booster/starter which has a voltage rating above 12 volts to start engine.
2. Always be sure the battery is properly connected to the vehicle prior to attempting to start engine.
3. Don't disconnect the battery when the engine is running.
4. When charging a battery, be sure battery cables are disconnected.
5. The battery contains acid and produces explosive gas (hydrogen). Avoid creating sparks near battery.