Battery light on my 318 is constently on, but starting ok

[dmc2884]

The battery light on my 2000 318i is staying on but the car has been starting fine for a week now, also when i start the car the yellow oil light comes on for 15 seconds then goes off again...

can anyone help

thanks Daniel

[dmc2884]

my oil level is still on maximum, i was told it could be the oil pressure switch