A proper electric rc car battery will last about 10 minutes.

All proper rc car batteries last for about 10 minutes, from a £100 car to a £1000 one. The toy ones last longer but this is because they are very slow so do not use any power. It has nothing to do with the price or quality like a Ferrari uses fuel quicker than a Skoda but the Skoda is not a better race car.

If you are looking for longer run times you could order a spare battery or quick charger or maybe have a look at a nitro model.