Battery check Opel Astra 2009 - 2013 | Haynes Manuals
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Locate the battery
Open the battery cover
Check the Negative (-) terminal clamp is tight
Open the 'Positive' (+) protective cover
Check the Positive (+) terminal clamp is tight. CAUTION If using a spanner to tighten terminal, be careful not to short the spanner on the bodywork
Check battery is generally secure. If loose, tighten the battery retainer
Tighten if required, a 10mm socket or spanner is needed. Not too tight because you may damage the battery casing
Replace the battery cover