Faulty Alternator?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt.
There could be a sensor wire that is bad or going bad
you have a short where negative is touching the metal of the car or it is grounded inproperly
on my old 1.2 clio the battery light came on as there was fault with the alternator and it needed replacing. As far as i know the battery light comes on when the battery is not charging or there is a fault with the battery.
The light comes on when there is a problem with the charging system. Normally this means the alternator is defective.
Your alternator is not keeping the battery charged.
check your battery cables. could be old or just loose.
Check the alternator.
Normally the alternator is defective. It can also be a loose alternator drive belt, or defective voltage regulator.
the battery and transmission are broken Have the system checked for trouble codes.
Your alternator could be bad have it checked this could also be that the car is getting the wrong amount of volts from the battery, either too much or too less
It means that there is something wrong with the engine and not the battery