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Volvo 480 ES - flat battery - lex_us_i
volvo battery drained when fan engine fan starts

headlights stuck up also cause battery drain ?

TIA

Volvo 480 ES - flat battery - cornishnutter
It could be that you alternator is not not as efficent as it should be. This would mean that power is being used from the battery when the engine is running as opposed to being used from the alternator this could cause you battery to run down over time.

Try recharging the battery, and see if you still loose power if so, have a look at your alternator !