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Home >> Porsche >> 2004 >> Cayenne Base >> Repair and Diagnosis >> Maintenance >> Procedures >> Maintenance, Self Diagnostics >> 03 01 Battery maintenance: checking condition of battery and battery vent hose - as of MY 2003 (Cayenne TIP, Cayenne MAN, Cayenne S TIP, Cayenne S MAN, Cayenne Turbo) >> Checking condition of battery and battery vent hose >> Check low-maintenance battery

Check low-maintenance battery

WARNING: Improper handling of batteries. 
  • Risk of injury and damage to the environment 

→ The accident prevention regulations must be strictly observed when handling battery acids.

→ Wear suitable protective clothing and protective glasses.

→ Only use a torch to illuminate the inside of the battery. Never illuminate the inside of the battery with a naked flame.

→ Do not handle a naked flame or lighted cigarettes near batteries.

→ Observe the disposal regulations for batteries and sulphuric acid when disposing of batteries.

NOTE:
  • Use a commercially available battery filling bottle. 
  • The correct acid level of the battery is an important factor for a long service life of the battery. 
  • When the acid level is too low, a capacity loss (performance loss) of the battery occurs, which is caused by the cell plates drying out. If the cell plates are not surrounded by electrolyte (battery acid), it will lead to corrosion of the lead plates, the plate bridges and the cell connectors. The result of the corrosion is that battery functioning cannot be guaranteed. The battery will become useless. 
  • If the acid level is too high, damage can occur by the battery acid (sulphuric acid/water mixture) leaking out of the battery. 

1. Unscrew battery plugs.

2. Shine a torch into the battery. The electrolyte level of the battery must be at the protruding " lug".

2.1. If the acid level is too low, refill with distilled water using the battery filling bottle.

3. Screw in battery plugs again and ensure that they are seated correctly.