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Hi there, Last night my ride (Mazda 2) while stationary at the traffic light, the RPM fluxuated slightly from 3/4 mark to 1/2 mark on the RPM gauge... The lights on dashboard dimmed slightly and my voltage gauge needle was swinging left and right... Wonder if this might be the start of battery failure???? Anyway, when I had reached my destination and parked, the RPM remained stable... Cannot replicate the fault... Not even this morning while driving and at my mechanic... Well, had my battery replaced as a safe measure and for peace of mind (Since it's used for 1 year and 4 months already)... Changed to Dynamics 45AMP at $70.20 (with 10% discount) and now the RPM is very stable... Any idea if it's due to a weakening battery or might there be some other faults that I need to look out for??? Like maybe spark plug? (Not likely as my mech told me that if spark plug, car will be jerking) or maybe aircon cutting in and causing this problem??? Mooooooooooooo