What does the battery charging warning light mean?

nidirect warns that a charging-system problem can lead to loss of power for lights and other electrical systems.

The cause can involve the alternator, belt, wiring, battery or another charging fault.

Reduce unnecessary electrical load, stop safely and arrange diagnosis rather than assuming the car will keep running indefinitely.

For 'What does the battery charging warning light mean?', treat the issue as a current roadworthiness matter rather than something to leave until the next MOT. A valid MOT does not protect you if the vehicle develops a defect afterwards.

Check the current source for 'What does the battery charging warning light mean?' before acting if the relevant rule, policy, fee or eligibility has recently changed. Keep any official confirmation or reference number produced by the process because it can help resolve a later query. This note is specific to answer 468.