Mazda 6 taking 4-5 seconds to start

[shocker-z]

Hi,

I have a 2004 Mazda 6 ts2 2.0 and a few weeks ago i left the lights on for an hour and it wasn't happy when i started it as expected. But now every now and then when i strat the engine it takes a good 4-5 seconds to start up. It happens randomly on small or long journeys.

Is it likley ot be the battery or somthing else?

happenes bout once or twice a week.

Any advice? Had the car about a month now.

Regards
Liam