Operation CHARM: Car repair manuals for everyone.

Battery Precautions

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