Clio sport 197
Hi everybody. I have a Clio 197 sport. Ever since I bought it 3 weeks ago, every time I drive it, after about 15mins the low battery, stop and battery lights come on and stay on. If I stop the car and restart it they go off, until 15mins have gone by. Alternator has been tested and is Charging. The battery is fine. Anybody got any ideas?