Battery check Porsche Boxster 1999 - 2009 | Haynes Manuals
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Locate the battery. It's accessed from the front boot
Open the battery cover - undo the two clips
Place the battery cover to one side
Check the Negative (-) terminal clamp is tight
Check the Positive (+) terminal clamp is tight. CAUTION If using a spanner to tighten terminal, be careful not to short it on the bodywork
Check battery is generally secure, if loose, tighten the battery retainer
The battery retaining clamp position
To tighten, a 13mm socket is needed. Not too tight because you may damage the battery casing
Replace the battery cover