Airbag check light staying on longer than I remember

As the title really, Have noticed the airbag light is staying on for about 3-5 seconds after the engine is started, which I haven't noticed before, is this normal and I just haven't noticed or is this likely indicative of a possible fault. Once it has gone off it is fine, and also seems to stay on less after the car is warm.

Mines same i wouldn't worry about it

Seen this sort of thing before on other cars for no reason. Only possibility I can think of could be a low battery voltage or battery in poor condition so when you crank a cold engine voltage drops quite low and airbag needs to "re-do" its "startup checks" after starting wheras when warm it does them as soon as the ignition comes on. Does that make sense? It's like, if you turned the ignition on then off then on then the total time the airbag light would be on for would be more than if you'd just turned the ignition on once. Same kind of thing is happening on cranking maybe (as far as the SRS ECU is concerned). Pete

Had the alarm go off the other night as well for no reason. So taken the phone charger out now to make sure it's not draining the battery too much. Might have just been the battery being a bit low. Headlamp bulb had gone last night as well when I left work. Not best pleased.