Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Battery Precautions


When working with batteries observe the following precautions:

1. Never use a booster/starter with a voltage rating above 12 volts to start engine.

2. Be sure the battery is properly connected--prior to starting engine.

3. Do not disconnect battery when engine is running.

4. Disconnect battery cables prior to charging battery.

5. Avoid creating sparks near battery--automotive batteries contain sulfuric acid and produce explosive hydrogen gas.